Log24

Friday, May 21, 2010

The Oslo Version

Filed under: General,Geometry — Tags: — m759 @ 9:29 am

From an art exhibition in Oslo last year–

Image-- Josefine Lyche's combination of Polster's phrase with Cullinane's images in her gallery show, Oslo, 2009-- 'The Smallest Perfect Universe -- Points and Hyperplanes'

The artist's description above is not in correct left-to-right order.
Actually the hyperplanes above are at left, the points at right.

Compare to "Picturing the Smallest Projective 3-Space,"
a note of mine from April 26, 1986—

Image-- Points and hyperplanes in the finite 3-space PG(3,2), April 1986, by Cullinane

Click for the original full version.

Compare also to Burkard Polster's original use of
the phrase "the smallest perfect universe."

Polster's tetrahedral model of points and hyperplanes
is quite different from my own square version above.

See also Cullinane on Polster.

Here are links to the gallery press release
and the artist's own photos.

Thursday, May 20, 2010

View

Filed under: General,Geometry — Tags: , — m759 @ 11:07 am
 

Box symbol

Pictorial version
of Hexagram 20,
Contemplation (View)

Related material:

A Handful of Dust
by J. G. Ballard

Tuesday, May 18, 2010

Stone Junction*

Filed under: General,Geometry — m759 @ 8:00 am

The Philosophers' Stone
according to
  The New York Times

http://www.log24.com/log/pix10A/100518-TheStoneNYT.jpg

Related material
from French cinema—

"a 'non-existent myth' of a battle between
goddesses of the sun and the moon
for a mysterious blue diamond
that has the power to make
mortals immortal and vice versa."

See also

   Word and Image

Juliette Binoche in 'Blue'  The
 24 2x2 Cullinane Kaleidoscope animated images

* The title is a reference to Jim Dodge's 1989 novel Stone Junction: An Alchemical Potboiler.

Monday, May 17, 2010

Rolling the Stone

Filed under: General,Geometry — m759 @ 10:12 pm

A new NY Times column:

http://www.log24.com/log/pix10A/100517-NYT-Stone.jpg

Today's New York Times
re-edited for philosophers:

http://www.log24.com/log/pix10A/100517-JonesClue.jpg

See also

Eightfold Symmetry,

John Baez's paper
Duality in Logic and Physics
(for a May 29 meeting at Oxford),

The Shining of May 29, and

Lubtchansky's Key, with its links
to Duelle (French, f. adj., dual)
and Art Wars for Trotsky's Birthday.

Saturday, May 15, 2010

Mathematics and Narrative continued…

Filed under: General,Geometry — Tags: — m759 @ 4:16 pm

Step Two

Image-- 'Then a miracle occurs' cartoon
Cartoon by S.Harris

Image-- Google search on 'miracle octad'-- top 3 results

Friday, May 14, 2010

Competing MOG Definitions

Filed under: General,Geometry — Tags: , , , — m759 @ 9:00 pm

A recently created Wikipedia article says that  “The Miracle Octad Generator [MOG] is an array of coordinates, arranged in four rows and six columns, capable of describing any point in 24-dimensional space….” (Clearly any  array with 24 parts is so capable.) The article ignores the fact that the MOG, as defined by R.T. Curtis in 1976, is not  an array of coordinates, but rather a picture of a correspondence between two sets, each containing 35 structures. (As a later commentator has remarked, this correspondence is a well-known one that preserves a certain incidence property. See Eightfold Geometry.)

From the 1976 paper defining the MOG—

“There is a correspondence between the two systems of 35 groups, which is illustrated in Fig. 4 (the MOG or Miracle Octad Generator).” —R.T. Curtis, “A New Combinatorial Approach to M24,” Mathematical Proceedings of the Cambridge Philosophical Society  (1976), 79: 25-42

http://www.log24.com/log/pix10A/100514-Curtis1976MOG.jpg

Curtis’s 1976 Fig. 4. (The MOG.)

The Wikipedia article, like a similar article at PlanetMath, is based on a different definition, from a book first published in 1988—

http://www.log24.com/log/pix10A/100514-SpherePack.jpg

I have not seen the 1973 Curtis paper, so I do not know whether it uses the 35-sets correspondence definition or the 6×4 array definition. The remarks of Conway and Sloane on page 312 of the 1998 edition of their book about “Curtis’s original way of finding octads in the MOG [Cur2]” indicate that the correspondence definition was the one Curtis used in 1973—

http://www.log24.com/log/pix10A/100514-ConwaySloaneMOG.jpg

Here the picture of  “the 35 standard sextets of the MOG”
is very like (modulo a reflection) Curtis’s 1976 picture
of the MOG as a correspondence between two 35-sets.

A later paper by Curtis does  use the array definition. See “Further Elementary Techniques Using the Miracle Octad Generator,” Proceedings of the Edinburgh Mathematical Society  (1989) 32, 345-353.

The array definition is better suited to Conway’s use of his hexacode  to describe octads, but it obscures the close connection of the MOG with finite geometry. That connection, apparent in the phrases “vector space structure in the standard square” and “parallel 2-spaces” (Conway and Sloane, third ed., p. 312, illustrated above), was not discussed in the 1976 Curtis paper.  See my own page on the MOG at finitegeometry.org.

Wednesday, May 5, 2010

Symmetry and Parallelisms

Filed under: General,Geometry — m759 @ 10:00 am

From a post of Peter J. Cameron today —

"… I want to consider the question: What is the role of the symmetric group in mathematics? "

Cameron's examples include, notably, parallelisms of lines in affine spaces over GF(2).

Tuesday, May 4, 2010

Mathematics and Narrative, continued

Filed under: General,Geometry — Tags: , , — m759 @ 8:28 pm

Romancing the
Non-Euclidean Hyperspace

Backstory
Mere Geometry, Types of Ambiguity,
Dream Time, and Diamond Theory, 1937

The cast of 1937's 'King Solomon's Mines' goes back to the future

For the 1937 grid, see Diamond Theory, 1937.

The grid is, as Mere Geometry points out, a non-Euclidean hyperspace.

For the diamonds of 2010, see Galois Geometry and Solomon’s Cube.

Monday, May 3, 2010

An Ordinary Evening

Filed under: General,Geometry — Tags: — m759 @ 8:00 pm

“…geometrically organized, with the parts labeled”

— Ursula K. Le Guin on what she calls “the Euclidean utopia

“There is such a thing as a tesseract.”

Madeleine L’Engle

Related material– Diamond Theory, 1937

Dream Time

Filed under: General,Geometry — Tags: , , — m759 @ 9:00 am

“Mere anarchy is loosed upon the world”

William Butler Yeats

From a document linked to here on April 30, Walpurgisnacht–

“…the Golden Age, or Dream Time, is remote only from the rational mind. It is not accessible to euclidean reason….”

“The utopia of the Grand Inquisitor ‘is the product of “the euclidean mind” (a phrase Dostoyevsky often used)….'”

“The purer, the more euclidean the reason that builds a utopia, the greater is its self-destructive capacity. I submit that our lack of faith in the benevolence of reason as the controlling power is well founded. We must test and trust our reason, but to have faith  in it is to elevate it to godhead.”

“Utopia has been euclidean, it has been European, and it has been masculine. I am trying to suggest, in an evasive, distrustful, untrustworthy fashion, and as obscurely as I can, that our final loss of faith in that radiant sandcastle may enable our eyes to adjust to a dimmer light and in it perceive another kind of utopia.”

“You will recall that the quality of static perfection is an essential element of the non-inhabitability of the euclidean utopia….”

“The euclidean utopia is mapped; it is geometrically organized, with the parts labeled….”

— Ursula K. Le Guin, “A Non-Euclidean View of California as a Cold Place to Be”

San Francisco Chronicle  today

“A May Day rally in Santa Cruz erupted into chaos Saturday night….”

“Had Goodman Brown fallen asleep in the forest,
and only dreamed a wild dream of a witch-meeting?”

Nathaniel Hawthorne

Saturday, May 1, 2010

An Education

Filed under: General,Geometry — Tags: — m759 @ 9:00 am
 

天鈞

 

Made famous by Ursula K. Le Guin
as the book title "Lathe of Heaven,"
this Chinese phrase, tianjun, apparently
means something more like "Scales of Heaven"–
an appropriate image for Law Day 2010.

Image--Scales (the legal symbol)

An anonymous forum user says that

"…if you switch the two characters around,
you get: 鈞天, which is one of
the nine heavens, more specifically,
the middle heaven."

This is supported by a
non-anonymous source:

"I follow A.C. Graham’s translation of
Juntian as 'Level Heaven (the innermost
of the nine divisions of heaven)';
he renders Juntian guangyue as
'the mighty music of the innermost heaven.'"

— "Music in the World of Su Shi (1037-1101):
Terminology
," by Stuart H. Sargent,
Colorado State University,
Journal of Sung-Yuan Studies 32 (2002), 39-81

The Nine Divisions of Heaven–

Image-- Routledge Encyclopedia of Taoism, Vol. I, on the Nine Heavens, 'jiutian,' ed. by Fabrizio Pregadio

Some context–

The 3x3 ('ninefold') square

"This pattern is a square divided into nine equal parts.
It has been called the 'Holy Field' division and
was used throughout Chinese history for many
different purposes, most of which were connected
with things religious, political, or philosophical."

The Magic Square: Cities in Ancient China,
by Alfred Schinz, Edition Axel Menges, 1996, p. 71

Thursday, April 29, 2010

Spider Woman

Filed under: General,Geometry — m759 @ 11:32 am

Mathematics and Narrative
(continued from April 26 and 28):

The Web

Image-- Google search for 'eightfold geometry'-- top result-- the Goddess as Spider Woman

See also

Leiber's Big Time, Spider Woman, and The Eight.

Wednesday, April 28, 2010

Eightfold Geometry

Filed under: General,Geometry — Tags: , , , , , — m759 @ 11:07 am

Image-- The 35 partitions of an 8-set into two 4-sets

Image-- Analysis of structure of the 35 partitions of an 8-set into two 4-sets

Image-- Miracle Octad Generator of R.T. Curtis

Related web pages:

Miracle Octad Generator,
Generating the Octad Generator,
Geometry of the 4×4 Square

Related folklore:

"It is commonly known that there is a bijection between the 35 unordered triples of a 7-set [i.e., the 35 partitions of an 8-set into two 4-sets] and the 35 lines of PG(3,2) such that lines intersect if and only if the corresponding triples have exactly one element in common." –"Generalized Polygons and Semipartial Geometries," by F. De Clerck, J. A. Thas, and H. Van Maldeghem, April 1996 minicourse, example 5 on page 6

The Miracle Octad Generator may be regarded as illustrating the folklore.

Update of August 20, 2010–

For facts rather than folklore about the above bijection, see The Moore Correspondence.

Monday, April 26, 2010

Types of Ambiguity

Filed under: General,Geometry — Tags: , — m759 @ 10:31 am

From Ursula K. Le Guin’s novel
The Dispossessed: An Ambiguous Utopia
(1974)—

Chapter One

“There was a wall. It did not look important. It was built of uncut rocks roughly mortared. An adult could look right over it, and even a child could climb it. Where it crossed the roadway, instead of having a gate it degenerated into mere geometry, a line, an idea of boundary. But the idea was real. It was important. For seven generations there had been nothing in the world more important than that wall.

Like all walls it was ambiguous, two-faced. What was inside it and what was outside it depended upon which side of it you were on.”

Note—

“We note that the phrase ‘instead of having a gate it degenerated into mere geometry’ is mere fatuousness. If there is an idea here, degenerate, mere, and geometry  in concert do not fix it. They bat at it like a kitten at a piece of loose thread.”

— Samuel R. Delany, The Jewel-Hinged Jaw: Notes on the Language of Science Fiction  (Dragon Press, 1977), page 110 of revised edition, Wesleyan University Press, 2009

(For the phrase mere geometry  elsewhere, see a note of April 22. The apparently flat figures in that note’s illustration “Galois Affine Geometry” may be regarded as degenerate  views of cubes.)

Later in the Le Guin novel—

“… The Terrans had been intellectual imperialists, jealous wall builders. Even Ainsetain, the originator of the theory, had felt compelled to give warning that his physics embraced no mode but the physical and should not be taken as implying the metaphysical, the philosophical, or the ethical. Which, of course, was superficially true; and yet he had used number, the bridge between the rational and the perceived, between psyche and matter, ‘Number the Indisputable,’ as the ancient founders of the Noble Science had called it. To employ mathematics in this sense was to employ the mode that preceded and led to all other modes. Ainsetain had known that; with endearing caution he had admitted that he believed his physics did, indeed, describe reality.

Strangeness and familiarity: in every movement of the Terran’s thought Shevek caught this combination, was constantly intrigued. And sympathetic: for Ainsetain, too, had been after a unifying field theory. Having explained the force of gravity as a function of the geometry of spacetime, he had sought to extend the synthesis to include electromagnetic forces. He had not succeeded. Even during his lifetime, and for many decades after his death, the physicists of his own world had turned away from his effort and its failure, pursuing the magnificent incoherences of quantum theory with its high technological yields, at last concentrating on the technological mode so exclusively as to arrive at a dead end, a catastrophic failure of imagination. Yet their original intuition had been sound: at the point where they had been, progress had lain in the indeterminacy which old Ainsetain had refused to accept. And his refusal had been equally correct– in the long run. Only he had lacked the tools to prove it– the Saeba variables and the theories of infinite velocity and complex cause. His unified field existed, in Cetian physics, but it existed on terms which he might not have been willing to accept; for the velocity of light as a limiting factor had been essential to his great theories. Both his Theories of Relativity were as beautiful, as valid, and as useful as ever after these centuries, and yet both depended upon a hypothesis that could not be proved true and that could be and had been proved, in certain circumstances, false.

But was not a theory of which all the elements were provably true a simple tautology? In the region of the unprovable, or even the disprovable, lay the only chance for breaking out of the circle and going ahead.

In which case, did the unprovability of the hypothesis of real coexistence– the problem which Shevek had been pounding his head against desperately for these last three days. and indeed these last ten years– really matter?

He had been groping and grabbing after certainty, as if it were something he could possess. He had been demanding a security, a guarantee, which is not granted, and which, if granted, would become a prison. By simply assuming the validity of real coexistence he was left free to use the lovely geometries of relativity; and then it would be possible to go ahead. The next step was perfectly clear. The coexistence of succession could be handled by a Saeban transformation series; thus approached, successivity and presence offered no antithesis at all. The fundamental unity of the Sequency and Simultaneity points of view became plain; the concept of interval served to connect the static and the dynamic aspect of the universe. How could he have stared at reality for ten years and not seen it? There would be no trouble at all in going on. Indeed he had already gone on. He was there. He saw all that was to come in this first, seemingly casual glimpse of the method, given him by his understanding of a failure in the distant past. The wall was down. The vision was both clear and whole. What he saw was simple, simpler than anything else. It was simplicity: and contained in it all complexity, all promise. It was revelation. It was the way clear, the way home, the light.”

Related material—

Time Fold, Halloween 2005, and May and Zan.

See also The Devil and Wallace Stevens

“In a letter to Harriet Monroe, written December 23, 1926, Stevens refers to the Sapphic fragment that invokes the genius of evening: ‘Evening star that bringest back all that lightsome Dawn hath scattered afar, thou bringest the sheep, thou bringest the goat, thou bringest the child home to the mother.’ Christmas, writes Stevens, ‘is like Sappho’s evening: it brings us all home to the fold’ (Letters of Wallace Stevens, 248).”

— “The Archangel of Evening,” Chapter 5 of Wallace Stevens: The Intensest Rendezvous, by Barbara M. Fisher, The University Press of Virginia, 1990

Thursday, April 22, 2010

Mere Geometry

Filed under: General,Geometry — Tags: — m759 @ 1:00 pm

Image-- semeion estin ou meros outhen

Image-- Euclid's definition of 'point'

Stanford Encyclopedia of Philosophy

Mereology (from the Greek μερος, ‘part’) is the theory of parthood relations: of the relations of part to whole and the relations of part to part within a whole. Its roots can be traced back to the early days of philosophy, beginning with the Presocratics….”

A non-Euclidean* approach to parts–

Image-- examples from Galois affine geometry

Corresponding non-Euclidean*
projective points —

Image-- The smallest Galois geometries

Richard J. Trudeau in The Non-Euclidean Revolution, chapter on “Geometry and the Diamond Theory of Truth”–

“… Plato and Kant, and most of the philosophers and scientists in the 2200-year interval between them, did share the following general presumptions:

(1) Diamonds– informative, certain truths about the world– exist.
(2) The theorems of Euclidean geometry are diamonds.

Presumption (1) is what I referred to earlier as the ‘Diamond Theory’ of truth. It is far, far older than deductive geometry.”

Trudeau’s book was published in 1987. The non-Euclidean* figures above illustrate concepts from a 1976 monograph, also called “Diamond Theory.”

Although non-Euclidean,* the theorems of the 1976 “Diamond Theory” are also, in Trudeau’s terminology, diamonds.

* “Non-Euclidean” here means merely “other than  Euclidean.” No violation of Euclid’s parallel postulate is implied.

Saturday, April 10, 2010

Geometry for Generations

Filed under: General,Geometry — Tags: — m759 @ 12:25 pm

"Let G  be a finite, primitive subgroup of GL(V) = GL(n,D), where V  is an n-dimensional vector space over the division ring D.  Assume that G  is generated by 'nice' transformations.  The problem is then to try to determine (up to GL(V)-conjugacy) all possibilities for G.  Of course, this problem is very vague.  But it is a classical one, going back 150 years, and yet very much alive today."

— William M. Kantor, "Generation of Linear Groups," pp. 497-509 in The Geometric Vein: The Coxeter Festschrift, published by Springer, 1981

This quote was added today to "A Simple Reflection Group of Order 168."

Sunday, April 4, 2010

URBI ET ORBI

Filed under: General,Geometry — Tags: — m759 @ 11:11 am

URBI
  (Toronto)–

Toronto Globe and Mail: AWB 'Three Sevens' flag

Click on image for some background.

ORBI
   (Globe and Mail)–

From March 19, 2010-- Weyl's 'Symmetry,' the triquetrum, and the eightfold cube

See also Baaad Blake and
Fearful Symmetry.

Saturday, April 3, 2010

Infinite Jest

Filed under: General,Geometry — Tags: — m759 @ 1:05 am

"Democrats– in conclusion– Democrats in America
were put on earth to do one thing– Drag the
ignorant hillbilly half of this country into the next
century, which in their case is the 19th."

Bill Maher on March 26

Reply to Maher:

"Hell is other people."
— Jean-Paul Sartre

With a laugh track.

Related material:

Dragging Maher into the 18th  century–

From
N. H. Abel on Elliptic Functions:
Problems of Division and Reduction
,
by Henrik Kragh Sørensen —

Related material– Lemniscate to Langlands (2004)
and references to the lemniscate in
Galois Theory, by David A. Cox (Wiley-IEEE, 2004)

Tuesday, March 30, 2010

Eightfold Symmetries

Filed under: General,Geometry — Tags: , , , — m759 @ 9:48 pm

Harvard Crimson headline today–
Deconstructing Design

Reconstructing Design

The phrase “eightfold way” in today’s
previous entry has a certain
graphic resonance…

For instance, an illustration from the
Wikipedia article “Noble Eightfold Path” —

Dharma Wheel from Wikipedia

Adapted detail–

Adapted Dharma Wheel detail

See also, from
St. Joseph’s Day

Weyl's 'Symmetry,' the triquetrum, and the eightfold cube

Harvard students who view Christian symbols
with fear and loathing may meditate
on the above as a representation of
the Gankyil rather than of the Trinity.

Lie Groups for Holy Week

Filed under: General,Geometry — Tags: — m759 @ 1:01 pm

Great line reading in 'Angels and Demons'- 'The God PARTICLE?'

Deep Down Things: The Breathtaking Beauty of Particle Physics, by Bruce A. Schumm, Johns Hopkins University Press, hardcover, Oct. 20, 2004, pp. 94-95–

"In the early 1960s, a physicist at the California Institute of Technology by the name of Murray Gell-Mann interpreted the patterns observed in the emerging array of elementary particles as being due to a symmetry….

Gell-Mann's eightfold way was perhaps the first conscious application of the results of the pure mathematical field of group theory and, in particular, the theory of 'Lie groups,' to a problem in physics."

From the preface–

"I didn't come up with the title for this book. For that, I can thank the people at the Johns Hopkins University Press…. my only reservation about the title is that… it implies a degree of literacy to which I can't lay claim."

Amen.

Remedial reading for those who might have fallen for Schumm's damned nonsense–

 "Quantum Mechanics and Group Theory I," by Dallas C. Kennedy

Group Theory and Physics, by Shlomo Sternberg

Sunday, March 21, 2010

Galois Field of Dreams

Filed under: General,Geometry — Tags: , — m759 @ 10:01 am

It is well known that the seven (22 + 2 +1) points of the projective plane of order 2 correspond to 2-point subspaces (lines) of the linear 3-space over the two-element field Galois field GF(2), and may be therefore be visualized as 2-cube subsets of the 2×2×2 cube.

Similarly, recent posts* have noted that the thirteen (32 + 3 + 1) points of the projective plane of order 3 may be seen as 3-cube subsets in the 3×3×3 cube.

The twenty-one (42 + 4 +1) points of the (unique) projective plane of order 4 may also be visualized as subsets of a cube– in this case, the 4×4×4 cube. This visualization is somewhat more complicated than the 3×3×3 case, since the 4×4×4 cube has no central subcube, and each projective-plane point corresponds to four, not three, subcubes.

These three cubes, with 8, 27, and 64 subcubes, thus serve as geometric models in a straightforward way– first as models of finite linear spaces, hence as models for small Galois geometries derived from the linear spaces. (The cubes with 8 and 64 subcubes also serve in a less straightforward, and new, way as finite-geometry models– see The Eightfold Cube, Block Designs, and Solomon's Cube.)

A group of collineations** of the 21-point plane is one of two nonisomorphic simple groups of order 20,160. The other is the linear group acting on the linear 4-space over the two-element Galois field  GF(2). The 1899 paper establishing the nonisomorphism notes that "the expression Galois Field is perhaps not yet in general use."

Coordinates of the 4×4×4 cube's subcubes can, of course, be regarded as elements of the Galois field GF(64).

The preceding remarks were purely mathematical. The "dreams" of this post's title are not. See…

Number and Time, by Marie-Louise von Franz

See also Geometry of the I Ching and a search in this journal for "Galois + Ching."

* February 27 and March 13

** G20160 in Mitchell 1910,  LF(3,22) in Edge 1965

— Mitchell, Ulysses Grant, "Geometry and Collineation Groups
   of the Finite Projective Plane PG(2,22),"
   Princeton Ph.D. dissertation (1910)

— Edge, W. L., "Some Implications of the Geometry of
   the 21-Point Plane," Math. Zeitschr. 87, 348-362 (1965)

Friday, March 19, 2010

Garden of Forking Paths

Filed under: General,Geometry — Tags: , — m759 @ 10:18 am

For Alyssa

 

 An Old Magic Symbol

http://www.log24.com/log/pix10/100319-Palermo.gif

… and for Dan Brown —

Symbology
Robert Langdon (played by Tom Hanks) and a corner of Solomon's Cube

Wednesday, March 17, 2010

Prime Directive

Filed under: General,Geometry — m759 @ 4:01 pm

Rigor

“317 is a prime, not because we think so,
or because our minds are shaped in one way
rather than another, but because it is so,
because mathematical reality is built that way.”

 – G. H. Hardy,
A Mathematician’s Apology

The Ratzinger brothers in Germany, Sept. 11, 2006

The above photo is taken from
a post in this journal dated
March 10, 2010.

This was, as the Pope might say,
the dies natalis  of a master gameplayer–

New York Times, March 16, 2010–

Tim Holland, Backgammon Master,
Dies at 79

By DENNIS HEVESI

Tim Holland, who was widely considered the world’s greatest backgammon player during that ancient board game’s modern heyday, in the 1960s and ’70s, died on March 10 at his home in West Palm Beach, Fla. He was 79. <<more>>

In Holland's honor, a post
from Columbus Day, 2004

Tuesday October 12, 2004

11:11 PM

 Time and Chance

Today’s winning lottery numbers
in Pennsylvania (State of Grace):

Midday: 373
Evening: 816.

New Yorker cartoon-- Heavenly chessboard-- Man peering over the edge sees backgammon board

A quote from Holland on backgammon–

"It’s the luck factor that seduces everyone
into believing that they are good,
that they can actually win,
but that’s just wishful thinking."

For those who are, like G.H. Hardy,
suspicious of wishful thinking,
here is a quote and a picture from
Holland's ordinary  birthday, March 3

"The die is cast." — Caesar

Group of 8 cube-face permutations generated by reflections in midplanes parallel to faces

Tuesday, March 16, 2010

Gameplayers of the Academy

Filed under: General,Geometry — Tags: , — m759 @ 9:00 am

New Game

In memory of a Jesuit who died on February 22 (see yesterday's "For the Ides of March")–

“The Game in the Ship cannot be approached as a job, a vocation, a career, or a recreation. To the contrary, it is Life and Death itself at work there. In the Inner Game, we call the Game Dhum Welur, the Mind of God."

— M. A. Foster, The Gameplayers of Zan

"… for Othello, no less than his creator Shakespeare, death without speechmaking is almost unthinkable."

"Walter Ong," by Jeet Heer (Book & Culture, July/August 2004)

"This Jack, joke, poor potsherd, patch, matchwood…."

— Jesuit quote at David Lavery's weblog today

See also this journal on February 22, the date of the Jesuit death. A post on that date mentions Ong and his teacher McLuhan, and displays a McLuhan figure related to the "joke" quote above–

McLuhan 'tetrad' figure with four diamonds surrounding a fifth, the medium

Click figure for background.

Ong discussed "agonistic" culture.
See "Sunday's Theater" and a film
based on the novel discussed there–

Menin... First line, in Greek, of the Iliad

Classics 101

IMAGE- Anthony Hopkins in 'The Human Stain'

Prof. Coleman Silk introduces
freshmen to academic values

For academic gameplayers who prefer
less emotionally challenging subjects,
there is Othello Online —

http://www.log24.com/log/pix10/100316-NewGame.jpg

"New Game. You May Pass for White to Start."

Monday, March 15, 2010

But Seriously…

Filed under: General,Geometry — m759 @ 4:00 pm

Kugelbild

"You are retracing your steps."
— Jacques Derrida

http://www.log24.com/log/pix10/100315-SphereAngels.jpg

www.yourmuseumstore.com

See also today's update (scroll down)
to Half-Circle Patterns as well as
Angels and Demons and Symbology.

Saturday, March 13, 2010

Space Cowboy

Filed under: General,Geometry — m759 @ 9:00 am

From yesterday's Seattle Times

According to police, employees of a Second Avenue mission said the suspect, clad in black and covered in duct tape, had come into the mission "and threatened to blow the place up." He then told staffers "that he was a vampire and wanted to eat people."

The man… also called himself "a space cowboy"….

This suggests two film titles…

Plan 9 from Outer Space

Rebecca Goldstein and a Cullinane quaternion

and Apollo's 13

The 13 symmetry axes of the (Euclidean) cube–
exactly one axis for each pair of opposite
  subcubes in the (Galois) 3×3×3 cube–

The 13 symmetry axes of the cube

Friday, March 12, 2010

Group Characters

Filed under: General,Geometry — Tags: , , — m759 @ 11:07 am

Steve Pond on “Crazy Heart”

“… this gentle little movie… is, after all, a character study– and in an alcoholic country singer named Bad Blake, we’ve got one hell of a character.”

And then there’s Baaad Blake–

Group Characters, from 'Symmetry,' Pergamon Press, 1963

Related material:

This journal on the president of
London’s Blake Society
and
Wikipedia on the founder of
Pergamon Press

Saturday, March 6, 2010

Deconstructing Alice

Filed under: General,Geometry — Tags: , , , — m759 @ 12:00 pm

Alyssa is  Wonderland

Manohla Dargis in The New York Times  yesterday

“Of course the character of Carroll’s original Alice is evident in each outrageous creation she dreams up in ‘Wonderland’ and in the sequel, ‘Through the Looking-Glass,’ which means that she’s a straight man to her own imagination. (She is  Wonderland.)”

Alyssa Milano as a child, with fork

From Inside the White Cube

“The sacramental nature of the space becomes clear, and so does one of the great projective laws of modernism: as modernism gets older, context becomes content. In a peculiar reversal, the object introduced into the gallery ‘frames’ the gallery and its laws.”

From Yogi Berra–

“When you come to a fork in the road, take it.”

Related material:  For Baron Samedi and…

Symbology
Robert Langdon (played by Tom Hanks) and a corner of Solomon's Cube
Jacques Derrida on the Looking-Glass garden, 'The Time before First,' and Solomon's seal

Wednesday, March 3, 2010

Plato’s Ghost

Filed under: General,Geometry — Tags: , — m759 @ 11:07 am

Jeremy Gray, Plato's Ghost: The Modernist Transformation of Mathematics, Princeton, 2008–

"Here, modernism is defined as an autonomous body of ideas, having little or no outward reference, placing considerable emphasis on formal aspects of the work and maintaining a complicated— indeed, anxious— rather than a naïve relationship with the day-to-day world, which is the de facto view of a coherent group of people, such as a professional or discipline-based group that has a high sense of the seriousness and value of what it is trying to achieve. This brisk definition…."

Brisk? Consider Caesar's "The die is cast," Gray in "Solomon's Cube," and yesterday's post

Group of 8 cube-face permutations generated by reflections in midplanes parallel to faces

This is the group of "8 rigid motions
generated by reflections in midplanes"
of Solomon's Cube.

Related material:

"… the action of G168 in its alternative guise as SL(3; Z/2Z) is also now apparent. This version of G168 was presented by Weber in [1896, p. 539],* where he attributed it to Kronecker."

— Jeremy Gray, "From the History of a Simple Group," in The Eightfold Way, MSRI Publications, 1998

Here MSRI, an acronym for Mathematical Sciences Research Institute, is pronounced "Misery." See Stephen King, K.C. Cole, and Heinrich Weber.

*H. Weber, Lehrbuch der Algebra, Vieweg, Braunschweig, 1896. Reprinted by Chelsea, New York, 1961.

Tuesday, March 2, 2010

Symmetry and Automorphisms

Filed under: General,Geometry — m759 @ 9:00 am

From the conclusion of Weyl's Symmetry

Weyl on symmetry and automorphisms

One example of Weyl's "structure-endowed entity" is a partition of a six-element set into three disjoint two-element sets– for instance, the partition of the six faces of a cube into three pairs of opposite faces.

The automorphism group of this faces-partition contains an order-8 subgroup that is isomorphic to the abstract group C2×C2×C2 of order eight–

Order-8 group generated by reflections in midplanes of cube parallel to faces

The action of Klein's simple group of order 168 on the Cayley diagram of C2×C2×C2 in yesterday's post furnishes an example of Weyl's statement that

"… one may ask with respect to a given abstract group: What is the group of its automorphisms…?"

Monday, March 1, 2010

Visual Group Theory

Filed under: General,Geometry — Tags: — m759 @ 12:00 pm

The current article on group theory at Wikipedia has a Rubik's Cube as its logo– 

Wikipedia article 'Group theory' with Rubik Cube and quote from Nathan Carter-- 'What is symmetry?'

 

The article quotes Nathan C. Carter on the question "What is symmetry?"

This naturally suggests the question "Who is Nathan C. Carter?"

A search for the answer yields the following set of images…

Labelings of the eightfold cube

Click image for some historical background.

Carter turns out to be a mathematics professor at Bentley University.  His logo– an eightfold-cube labeling (in the guise of a Cayley graph)– is in much better taste than Wikipedia's.
 

Saturday, February 27, 2010

Cubist Geometries

Filed under: General,Geometry — Tags: , , , — m759 @ 2:01 pm

"The cube has…13 axes of symmetry:
  6 C2 (axes joining midpoints of opposite edges),
4 C3 (space diagonals), and
3C4 (axes joining opposite face centroids)."
–Wolfram MathWorld article on the cube

These 13 symmetry axes can be used to illustrate the interplay between Euclidean and Galois geometry in a cubic model of the 13-point Galois plane.

The geometer's 3×3×3 cube–
27 separate subcubes unconnected
by any Rubik-like mechanism–

The 3x3x3 geometer's cube, with coordinates

The 13 symmetry axes of the (Euclidean) cube–
exactly one axis for each pair of opposite
  subcubes in the (Galois) 3×3×3 cube–

The 13 symmetry axes of the cube

A closely related structure–
the finite projective plane
with 13 points and 13 lines–

Oxley's 2004 drawing of the 13-point projective plane

A later version of the 13-point plane
by Ed Pegg Jr.–

Ed Pegg Jr.'s 2007 drawing of the 13-point projective plane

A group action on the 3×3×3 cube
as illustrated by a Wolfram program
by Ed Pegg Jr. (undated, but closely
related to a March 26, 1985 note
by Steven H. Cullinane)–

Ed Pegg Jr.'s program at Wolfram demonstrating concepts of a 1985 note by Cullinane

The above images tell a story of sorts.
The moral of the story–

Galois projective geometries can be viewed
in the context of the larger affine geometries
from which they are derived.

The standard definition of points in a Galois projective plane is that they are lines through the (arbitrarily chosen) origin in a corresponding affine 3-space converted to a vector 3-space.

If we choose the origin as the center cube in coordinatizing the 3×3×3 cube (See Weyl's relativity problem ), then the cube's 13 axes of symmetry can, if the other 26 cubes have properly (Weyl's "objectively") chosen coordinates, illustrate nicely the 13 projective points derived from the 27 affine points in the cube model.

The 13 lines of the resulting Galois projective plane may be derived from Euclidean planes  through the cube's center point that are perpendicular to the cube's 13 Euclidean symmetry axes.

The above standard definition of points in a Galois projective plane may of course also be used in a simpler structure– the eightfold cube.

(The eightfold cube also allows a less standard way to picture projective points that is related to the symmetries of "diamond" patterns formed by group actions on graphic designs.)

See also Ed Pegg Jr. on finite geometry on May 30, 2006
at the Mathematical Association of America.

Wednesday, February 24, 2010

Transvections

Filed under: General,Geometry — m759 @ 4:24 pm

A topic related to A Simple Reflection Group of Order 168

Transvection groups over GF(2). See, for instance…

  1. Binary Coordinate Systems, by Steven H. Cullinane, 1984
     
  2. Classification of the Finite N-Generator Transvection Groups Over Z2, by Jizhu Nan and Jing Zhao, 2009, Advances in Applied Mathematics Vol. 44 Issue 3 (March 2010), 185–202
     
  3. Anne Shepler, video of a talk on Nov. 4, 2004, "Reflection Groups and Modular Invariant Theory"

Monday, February 22, 2010

Annals of Philosophy

Filed under: General,Geometry — Tags: , — m759 @ 1:00 pm

The Medium is the Message

http://www.log24.com/log/pix10/100222-McLuhan.jpg
Marshall McLuhan

From the Wikipedia article
on Marshall McLuhan–

McLuhan 'tetrad' figure with four diamonds surrounding a fifth, the medium

From yesterday

(Click images for some background.)

Ian McKellen at 'Neverwas' diamond windows

Related material:

Feast of St. Louis, 2003,

a web page on McLuhan's
student Walter J. Ong, S. J.,

and Jung and the Imago Dei

Sunday, February 21, 2010

Reflections

Filed under: General,Geometry — Tags: , , — m759 @ 12:06 pm

From the Wikipedia article "Reflection Group" that I created on Aug. 10, 2005as revised on Nov. 25, 2009

Historically, (Coxeter 1934) proved that every reflection group [Euclidean, by the current Wikipedia definition] is a Coxeter group (i.e., has a presentation where all relations are of the form ri2 or (rirj)k), and indeed this paper introduced the notion of a Coxeter group, while (Coxeter 1935) proved that every finite Coxeter group had a representation as a reflection group [again, Euclidean], and classified finite Coxeter groups.

Finite fields

This section requires expansion.

When working over finite fields, one defines a "reflection" as a map that fixes a hyperplane (otherwise for example there would be no reflections in characteristic 2, as −1=1 so reflections are the identity). Geometrically, this amounts to including shears in a hyperplane. Reflection groups over finite fields of characteristic not 2 were classified in (Zalesskiĭ & Serežkin 1981).

Related material:

"A Simple Reflection Group of Order 168," by Steven H. Cullinane, and

"Determination of the Finite Primitive Reflection Groups over an Arbitrary Field of Characteristic Not 2,"

by Ascher Wagner, U. of Birmingham, received 27 July 1977

Journal   Geometriae Dedicata
Publisher   Springer Netherlands
Issue   Volume 9, Number 2 / June, 1980

Ascher Wagner's 1977 dismissal of reflection groups over fields of characteristic 2

[A primitive permuation group preserves
no nontrivial partition of the set it acts upon.]

Clearly the eightfold cube is a counterexample.

Saturday, February 20, 2010

The Mathieu Relativity Problem

Filed under: General,Geometry — m759 @ 10:10 am

Weyl on what he calls the relativity problem

"The relativity problem is one of central significance throughout geometry and algebra and has been recognized as such by the mathematicians at an early time."

— Hermann Weyl, 1949, "Relativity Theory as a Stimulus in Mathematical Research"

"This is the relativity problem: to fix objectively a class of equivalent coordinatizations and to ascertain the group of transformations S mediating between them."

— Hermann Weyl, 1946, The Classical Groups, Princeton University Press, p. 16

Twenty-four years ago a note of Feb. 20, 1986, supplied an example of such coordinatizations in finite geometry. In that note, the group of mediating transformations acted directly on coordinates within a 4×4 array. When the 4×4 array is embedded in a 4×6 array, a larger and more interesting group, M24 (containing the original group), acts on the larger array.  There is no obvious solution to Weyl's relativity problem for M24.  That is, there is no obvious way to apply exactly 24 distinct transformable coordinates (or symbol-strings) to the 24 array elements in such a way that the natural group of mediating transformations of the 24 symbol-strings is M24.

There is, however, an assignment of symbol-strings that yields a family of sets with automorphism group M24.

R.D. Carmichael in 1931 on his construction of the Steiner system S(5,8,24)–

"The linear fractional group modulo 23 of order 24•23•11 is often represented as a doubly transitive group of degree 24 on the symbols ∞, 0, 1, 2,…, 22. This transitive group contains a subgroup of order 8 each element of which transforms into itself the set ∞, 0, 1, 3, 12, 15, 21, 22 of eight elements, while the whole group transforms this set into 3•23•11 sets of eight each. This configuration of octuples has the remarkable property that any given set of five of the 24 symbols occurs in one and just one of these octuples. The largest permutation group Γ on the 24 symbols, each element of which leaves this configuration invariant, is a five-fold transitive group of degree 24 and order 24•23•22•21•20•48. This is the Mathieu group of degree 24."

— R. D. Carmichael, 1931, "Tactical Configurations of Rank Two," in American Journal of Mathematics, Vol. 53, No. 1 (Jan., 1931), pp. 217-240

Friday, February 19, 2010

Mimzy vs. Mimsy

Filed under: General,Geometry — Tags: , , , — m759 @ 11:00 am

 

Deep Play:

Mimzy vs. Mimsy

From a 2007 film, "The Last Mimzy," based on
the classic 1943 story by Lewis Padgett
  "Mimsy Were the Borogoves"–

http://www.log24.com/log/pix10/100219-LastMimzyTrailer.jpg

As the above mandala pictures show,
the film incorporates many New Age fashions.

The original story does not.

A more realistic version of the story
might replace the mandalas with
the following illustrations–

The Eightfold Cube and a related page from a 1906 edition of 'Paradise of Childhood'

Click to enlarge.

For a commentary, see "Non-Euclidean Blocks."

(Here "non-Euclidean" means simply
other than  Euclidean. It does not imply any
  violation of Euclid's parallel postulate.)

Thursday, February 18, 2010

Theories: An Outline

Filed under: General,Geometry — Tags: , , , , — m759 @ 10:31 am

Truth, Geometry, Algebra

The following notes are related to A Simple Reflection Group of Order 168.

1. According to H.S.M. Coxeter and Richard J. Trudeau

“There is a pleasantly discursive treatment of Pontius Pilate’s unanswered question ‘What is truth?’.”

— Coxeter, 1987, introduction to Trudeau’s The Non-Euclidean Revolution

1.1 Trudeau’s Diamond Theory of Truth

1.2 Trudeau’s Story Theory of Truth

2. According to Alexandre Borovik and Steven H. Cullinane

2.1 Coxeter Theory according to Borovik

2.1.1 The Geometry–

Mirror Systems in Coxeter Theory

2.1.2 The Algebra–

Coxeter Languages in Coxeter Theory

2.2 Diamond Theory according to Cullinane

2.2.1 The Geometry–

Examples: Eightfold Cube and Solomon’s Cube

2.2.2 The Algebra–

Examples: Cullinane and (rather indirectly related) Gerhard Grams

Summary of the story thus far:

Diamond theory and Coxeter theory are to some extent analogous– both deal with reflection groups and both have a visual (i.e., geometric) side and a verbal (i.e., algebraic) side.  Coxeter theory is of course highly developed on both sides. Diamond theory is, on the geometric side, currently restricted to examples in at most three Euclidean (and six binary) dimensions. On the algebraic side, it is woefully underdeveloped. For material related to the algebraic side, search the Web for generators+relations+”characteristic two” (or “2“) and for generators+relations+”GF(2)”. (This last search is the source of the Grams reference in 2.2.2 above.)

Tuesday, February 16, 2010

Mysteries of Faith

Filed under: General,Geometry — Tags: , — m759 @ 9:00 am

From today's NY Times

http://www.log24.com/log/pix10/100216-NYTobits.jpg

Obituaries for mystery authors
Ralph McInerny and Dick Francis

From the date (Jan. 29) of McInerny's death–

"…although a work of art 'is formed around something missing,' this 'void is its vanishing point, not its essence.'"

Harvard University Press on Persons and Things (Walpurgisnacht, 2008), by Barbara Johnson

From the date (Feb. 14) of Francis's death–

2x2x2 cube

The EIghtfold Cube

The "something missing" in the above figure is an eighth cube, hidden behind the others pictured.

This eighth cube is not, as Johnson would have it, a void and "vanishing point," but is instead the "still point" of T.S. Eliot. (See the epigraph to the chapter on automorphism groups in Parallelisms of Complete Designs, by Peter J. Cameron. See also related material in this journal.) The automorphism group here is of course the order-168 simple group of Felix Christian Klein.

For a connection to horses, see
a March 31, 2004, post
commemorating the birth of Descartes
  and the death of Coxeter–

Putting Descartes Before Dehors

     Binary coordinates for a 4x2 array  Chess knight formed by a Singer 7-cycle

For a more Protestant meditation,
see The Cross of Descartes

Descartes

Descartes's Cross

"I've been the front end of a horse
and the rear end. The front end is better."
— Old vaudeville joke

For further details, click on
the image below–

Quine and Derrida at Notre Dame Philosophical Reviews

Notre Dame Philosophical Reviews

Sunday, February 14, 2010

Sunday School

Filed under: General,Geometry — m759 @ 9:00 am

"Simplify, simplify." — Henry David Thoreau

"Because of their truly fundamental role in mathematics, even the simplest diagrams concerning finite reflection groups (or finite mirror systems, or root systems– the languages are equivalent) have interpretations of cosmological proportions."

Alexandre Borovik, 2010 (See previous entry.)

Exercise: Discuss Borovik's remark
that "the languages are equivalent"
in light of the web page

http://www.log24.com/log/pix10/100214-Cube2x2x2.gif

A Simple Reflection Group
of Order 168
.

Background:

Theorems 15.1 and 15.2 of Borovik's book (1st ed. Nov. 10, 2009)
Mirrors and Reflections: The Geometry of Finite Reflection Groups

15.1 (p. 114): Every finite reflection group is a Coxeter group.

15.2 (p. 114): Every finite Coxeter group is isomorphic to a finite reflection group.

Consider in this context the above simple reflection group of order 168.

(Recall that "…there is only one simple Coxeter group (up to isomorphism); it has order 2…" —A.M. Cohen.)

Example

Filed under: General,Geometry — m759 @ 8:28 am

From Alexandre Borovik's new book
Mathematics Under the Microscope
  (American Mathematical Society, 2010)–

http://www.log24.com/log/pix10/100214-Example.gif

Related material:

Finite Geometry and Physical Space
(Good Friday, 2009)

This kindergarten-level discussion of
the simple group of order 168
also illustrates Thoreau's advice:

"Simplicity, simplicity, simplicity!"

Saturday, February 13, 2010

Entertainment continued

Filed under: General,Geometry — m759 @ 9:28 am

Logic is all about the entertaining of possibilities.”

– Colin McGinn, Mindsight: Image, Dream, Meaning,
   Harvard University Press, 2004

Geometry of Language,
continued from St. George's Day, 2009


Professor Arielle Saiber with chess set

Excerpt from Jasper Hopkins's 'Concise Introduction to the Philosophy of Nicholas of Cusa

Related material:

Prima Materia,
The Galois Quaternion,
and The Wake of Imagination.

See also the following from a physicist
(not of the most orthodox sort, but his remarks
  here on Heisenberg seem quite respectable)–

Ian J. Thompson, 7 Dec. 2009

Quantum mechanics describes the probabilities of actual outcomes in terms of a wave function, or at least of a quantum state of amplitudes that varies with time. The public always asks what the wave function is, or what the amplitudes are amplitudes of. Usually, we reply that the amplitudes are ‘probability amplitudes’, or that the wave function is a ‘probability wave function’, but neither answer is ontologically satisfying since probabilities are numbers, not stuff. We have already rehearsed the objections to the natural world being made out of numbers, as these are pure forms. In fact, ‘waves’, ‘amplitudes’ and ‘probabilities’ are all forms, and none of them can be substances. So, what are quantum objects made of: what stuff?

According to Heisenberg [6], the quantum probability waves are “a quantitative formulation of the concept of ‘dynamis’, possibility, or in the later Latin version, ‘potentia’, in Aristotle’s philosophy. The concept of events not determined in a peremptory manner, but that the possibility or ‘tendency’ for an event to take place has a kind of reality—a certain intermediate layer of reality, halfway between the massive reality of matter and the intellectual reality of the idea or the image—this concept plays a decisive role in Aristotle’s philosophy. In modern quantum theory this concept takes on a new form; it is formulated quantitatively as probability and subjected to mathematically expressible laws of nature.” Unfortunately Heisenberg does not develop this interpretation much beyond the sort of generality of the above statements, and the concept of ‘potentiality’ remains awkwardly isolated from much of his other thought on this subject [7]. It is unclear even what he means by ‘potentia’.

Reference

Heisenberg, W. 1961 On Modern Physics, London: Orion Press.

Notes

[6] W. Heisenberg, ‘Planck’s discovery and the philosophical problems of atomic physics’, pp. 3-20 in Heisenberg (1961).

[7] Heisenberg, for example, brings into his thought on quantum physics the Kantian phenomena/noumena distinction, as well as some of Bohr’s ideas on ‘complementarity’ in experimental arrangements.

Friday, February 12, 2010

Capital E

Filed under: General,Geometry — m759 @ 10:30 am

Where Entertainment is God, continued

The following paragraphs are from a review by Piotr Siemion of Infinite Jest, a novel by David Foster Wallace. Illustrations have been added.

"Wallace was somehow able to twist together three yarns…. …there's a J.D Salinger for those who like J.D. Salinger. There's William Burroughs for those hardy souls who like some kick in their prose. And there's a dash of Kurt Vonnegut too. All three voices, though, are amplified in Infinite Jest beyond mere distortion and then projected onto Wallace's peculiar own three-ring circus….

Venn diagram of three sets

… there's entertainment. Make it a capital E.

Hilary Swank in 'Million Dollar Baby'

Illustration by Clint Eastwood
from Log24 post "E is for Everlast"

Infinite Jest revolves, among its many gyrations, around the story of the Entertainment, a film-like creation going by the title of 'Infinite Jest' and created shortly before his suicidal death by the young tennis star's father. The Entertainment's copies are now being disseminated clandestinely all over Wallace's funny America. Problem is, of course, that the film is too good. Anybody who gets to watch it becomes hooked instantly and craves only to watch it again, and again, and again, until the audience drops dead of exhaustion and hunger. Why eat when you're entertained by such a good movie? Wallace's premise brings you back to that apocryphal lab experiment in which rats were treated to a similar choice. When the rat pushed one button, marked FOOD, it would get a food pellet. The other button, marked FUN, would fire up an electrode rigged right into the orgasm center somewhere in the rat's cortex. Needless to add, one rat after another would drop dead from hunger, still twitching luridly and trying to finesse one last push of the button. Same thing in Wallace's story, especially that even those characters who have not seen the Entertainment yet, keep on entertaining themselves by different means."

The title of the Entertainment, "Infinite Jest," might also be applied to a BBC program featuring mathematician Peter J. Cameron. The program's actual title was "To Infinity and Beyond." It was broadcast the night of Feb. 10 (the date of this journal's previous post).

Few, however, are likely to find the Infinity program addictive. For closer approaches to Wallace's ideal Entertainment, see instead Dante (in the context of this journal's Feb. 4 posts on Cameron and the afterlife) and the BBC News.

Saturday, February 6, 2010

Conceptual Art, continued–

Filed under: General,Geometry — Tags: , — m759 @ 11:01 am

Argument for the Existence of Rebecca

Adapted from YouTube's "Mathematics and Religion," starring Rebecca Newberger Goldstein, author of the recent novel 36 Arguments for the Existence of God

Rebecca Goldstein and a Cullinane quaternion

The added Quaternion  picture is from
Groundhog Day, 2009.

Conceptual Art

Filed under: General,Geometry — Tags: , — m759 @ 9:00 am

The Plane of Time

From tomorrow's NY Times Book Review, Geoff Dyer's review of DeLillo's new novel Point Omega is now online

"The book begins and ends with Douglas Gordon’s film project '24 Hour Psycho' (installed at the Museum of Modern Art in Manhattan in 2006), in which the 109-­minute Hitchcock original is slowed so that it takes a full day and night to twitch by. DeLillo conveys with haunting lucidity the uncanny beauty of 'the actor’s eyes in slow transit across his bony sockets,' 'Janet Leigh in the detailed process of not knowing what is about to happen to her.' Of course, DeLillo being DeLillo, it’s the deeper implications of the piece— what it reveals about the nature of film, perception and time— that detain him. As an unidentified spectator, DeLillo is mesmerized by the 'radically altered plane of time': 'The less there was to see, the harder he looked, the more he saw.'

This prologue and epilogue make up a phenomenological essay on one of the rare artworks of recent times to merit the prefix 'conceptual.'"

Related material:

Steering a Space-Plane
(February 2, 2003)

Holly Day
(February 3, 2010)

Attitude Adjustment
(February 3, 2010)

Stephen Savage illustration for 2/2/03 NYT review of 'A Box of Matches'

Cover illustration by Stephen Savage,
NY Times Book Review,
Feb. 2 (Candlemas), 2003

“We live the time that a match flickers.”

– Robert Louis Stevenson, Aes Triplex

Friday, February 5, 2010

The Great Brown

Filed under: General,Geometry — m759 @ 9:00 pm

Today's New York Times on a current theatrical presentation of The Great Gatsby

"Throughout the show, the relationship between what is read and its context keeps shifting, with the real world finally giving way entirely to the fictive one."

Owl Eyes in The Great Gatsby

"This fella's a regular Belasco."

http://www.log24.com/log/pix10/100204-DavidBrownSm.jpg

David Brown, producer. Brown died on Monday.

From The Diamond as Big as the Monster in this journal on Dec. 21, 2005–

"At the still point, there the dance is.” –T. S. Eliot, Four Quartets

Eliot was quoted in the epigraph to the chapter on automorphism groups in Parallelisms of Complete Designs, by Peter J. Cameron, published when Cameron was at Merton College, Oxford.

“As Gatsby closed the door of ‘the Merton College Library’ I could have sworn I heard the owl-eyed man break into ghostly laughter.” –F. Scott Fitzgerald

Related material: Yesterday's posts and the jewel in Venn's lotus.

Thursday, February 4, 2010

Requiem for a Force–

Filed under: General,Geometry — Tags: — m759 @ 3:30 pm

Where Three Worlds Meet

Venn diagram of three sets

From an obituary for David Brown, who died at 93 on Monday–

"David Brown was a force in the entertainment, literary and journalism worlds," Frank A. Bennack, Jr., vice chairman and chief executive officer of Hearst Corporation, said in a statement Tuesday. —Polly Anderson of the Associated Press

Mark Kramer, "Breakable Rules for Literary Journalists," Section 8–

"Readers are likely to care about how a situation came about and what happens next when they are experiencing it with the characters. Successful literary journalists never forget to be entertaining. The graver the writer's intentions, and the more earnest and crucial the message or analysis behind the story, the more readers ought to be kept engaged. Style and structure knit story and idea alluringly.

If the author does all this storytelling and digressing and industrious structure-building adroitly, readers come to feel they are heading somewhere with purpose, that the job of reading has a worthy destination. The sorts of somewheres that literary journalists reach tend to marry eternal meanings and everyday scenes. Richard Preston's 'The Mountains of Pi,' for instance, links the awkward daily lives of two shy Russian emigre mathematicians to their obscure intergalactic search for hints of underlying order in a chaotic universe."

Hints:

Logic is all about the entertaining of possibilities.”

— Colin McGinn, Mindsight: Image, Dream, Meaning, Harvard U. Press, 2004

"According to the Buddha, scholars speak in sixteen ways of the state of the soul after death…. While I hesitate to disagree with the Compassionate One, I think there are more than sixteen possibilities described here…."

Peter J. Cameron today

"That's entertainment!"

Jack Haley Jr.

Phenomenology of 256

Filed under: General,Geometry — Tags: — m759 @ 11:30 am

From Peter J. Cameron's weblog today

According to the Buddha,

Scholars speak in sixteen ways of the state of the soul after death. They say that it has form or is formless; has and has not form, or neither has nor has not form; it is finite or infinite; or both or neither; it has one mode of consciousness or several; has limited consciousness or infinite; is happy or miserable; or both or neither.

He does go on to say that such speculation is unprofitable; but bear with me for a moment.

With logical constructs such as “has and has not form, or neither has nor has not form”, it is perhaps a little difficult to see what is going on. But, while I hesitate to disagree with the Compassionate One, I think there are more than sixteen possibilities described here: how many?

Cameron's own answer (from problem solutions for his book Combinatorics)–

One could argue here that the numbers of choices should be multiplied, not added; there are 4 choices for form, 4 for finiteness, 2 for modes of consciousness, 2 for finiteness of consciousness, and 4 for happiness, total 28 = 256. (You may wish to consider whether all 256 are really possible.)

Related material– "What is 256 about?"

Some partial answers–

April 2, 2003 — The Question (lottery number)

May 2, 2003 — Zen and Language Games (page number)

August 4, 2003 — Venn's Trinity (power of two)

September 28, 2005 — Mathematical Narrative (page number)

October 26, 2005 — Human Conflict Number Five (chronomancy)

June 23, 2006 — Binary Geometry (power of two)

July 23, 2006 — Partitions (power of two)

October 3, 2006 — Hard Lessons (number of pages,
                                 as counted in one review)

October 10, 2006 — Mate (lottery number)

October 8, 2008 — Serious Numbers (page number)

Quoted here Nov. 10, 2009

Epigraphs at
Peter Cameron’s home page:

Quotes from Brautigan's 'The Hawkline Monster' and Hoban's 'Riddley Walker'

Happy birthday, Russell Hoban.

Monday, February 1, 2010

Frame by Frame

Filed under: General,Geometry — m759 @ 7:26 pm

From "Time's Breakdown," September 17, 2003

“… even if we can break down time into component Walsh functions, what would it achieve?”

– The Professor, in “Passing in Silence,” by Oliver Humpage

“Being is not a steady state but an occulting one: we are all of us a succession of stillness blurring into motion on the wheel of action, and it is in those spaces of black between the pictures that we find the heart of mystery in which we are never allowed to rest. The flickering of a film interrupts the intolerable continuity of apparent world; subliminally it gives us those in-between spaces of black that we crave.”

Gösta Kraken, Perception Perceived: an Unfinished Memoir (p. 9 in Fremder, a novel by Russell Hoban)

This flashback was suggested by

  1. A review in next Sunday's New York Times Book Review of a new novel, Point Omega, by Don DeLillo. The review's title (for which the reviewer, Geoff Dyer, should not be blamed) is "A Wrinkle in Time." The review and the book are indeed concerned with time, but the only apparent connection to the 1962 novel of Madeleine L'Engle also titled A Wrinkle in Time is rather indirect– via the Walsh functions mentioned above.
  2. A phrase in the Times's review, "frame by frame," also appeared in this jounal on Saturday. It formed part of the title of a current exhibition at Harvard's Carpenter Center for the Visual Arts.
  3. The Carpenter Center exhibition will have an opening reception on February 4.
  4. February 4 is also the birthday of the above Russell Hoban, who will turn 85. See a British web page devoted to that event.

DeLillo is a major novelist, but the work of Hoban seems more relevant to the phrase "frame by frame."

For St. Bridget’s Day

Filed under: General,Geometry — m759 @ 12:25 pm

"But wait, there's more!"
Stanley Fish, NY Times Jan. 28

From the editors at The New York Times who, left to their own devices, would produce yet another generation of leftist morons who don't know the difference between education and entertainment–

A new Times column starts today–

http://www.log24.com/log/pix10/100201-Strogatz.jpg

The quality of the column's logo speaks for itself. It pictures a cone with dashed lines indicating height and base radius, but unlabeled except for a large italic x to the right of the cone. This enigmatic variable may indicate the cone's height or slant height– or, possibly, its surface area or volume.

Instead of the column's opening load of crap about numbers and Sesame Street, a discussion of its logo might be helpful.

The cone plays a major role in the historical development of mathematics.

Some background from an online edition of Euclid

"Euclid proved in proposition XII.10 that the cone with the same base and height as a cylinder was one third of the cylinder, but he could not find the ratio of a sphere to the circumscribed cylinder. In the century after Euclid, Archimedes solved this problem as well as the much more difficult problem of the surface area of a sphere."

For Archimedes and the surface area of a sphere, see (for instance) a discussion by Kevin Brown. For more material on Archimedes, see "Archimedes: Volume of a Sphere," by Doug Faires (2001)– Archimedes' heuristic argument from mechanics that involves the volume of a cone– and Archimedes' more rigorous approach in The Works of Archimedes, edited by T. L. Heath (1897).

The work of Euclid and Archimedes on volumes was, of course, long before the discovery of calculus.  For a helpful discussion of cone volumes involving high-school-level calculus, see, for instance,  the following–

http://www.log24.com/log/pix10/100201-VolCalc.gif

The Times editors apparently feel that
few of their readers are capable of
such high-school-level sophistication.

For some other geometric illustrations
perhaps more appealing than the Times's

http://www.log24.com/log/pix10/100201-StrogatzLogo.png

dunce cap, see the symbol of
  today's saint– a Bridget Cross
and a web page on
visualized quaternions.

Saturday, January 30, 2010

Metamorphosis and Metaphor

Filed under: General,Geometry — m759 @ 12:31 pm

"Animation tends to be a condensed art form, using metamorphosis and metaphor to collide and expand meaning. In this way it resembles poetry."

— Harvard's Carpenter Center for the Visual Arts,
   description of an exhibition–

FRAME BY FRAME: ANIMATED AT HARVARD

January 28–Feb 14, 2010

For example–

Animation — The Animated Diamond Theorem,
                      now shown frame by frame for selected frames

Poetry–

Part I —  "That Nature is a Heraclitean Fire…."

Part II — Metaphor on the covers of a Salinger book–

Diamond covers for Salinger's 'Nine Stories'

Click image for details.

For other thoughts on
metamorphosis and metaphor,
see Endgame.

Wednesday, January 27, 2010

To Apollo

Filed under: General,Geometry — m759 @ 9:00 am

Yesterday's post may, if one likes, be regarded
  as a nod to Dionysus, god of tragedy.

Here is a complementary passage:

Nietzsche on Heraclitus and the 'play of fire with itself'

Related material:
Jung and the Imago Dei

Tuesday, January 26, 2010

Symbology

Filed under: General,Geometry — Tags: , , — m759 @ 9:00 pm

From this journal:

Friday December 5, 2008

m759 @ 1:06 PM
 
Mirror-Play of
the Fourfold

For an excellent commentary
 on this concept of Heidegger,

View selected pages
from the book

Dionysus Reborn:

Play and the Aesthetic Dimension
in Modern Philosophical and
Scientific Discourse

(Mihai I. Spariosu,
Cornell U. Press, 1989)

Related material:
the logo for a
web page

Logo for 'Elements of Finite Geometry'

– and Theme and Variations.

Transition to the
Garden of Forking Paths–

(See For Baron Samedi)–

The Found Symbol
Robert Langdon (played by Tom Hanks) and a corner of Solomon's Cube

and Dissemination, by Jacques Derrida,
translated by Barbara Johnson,
London, Athlone Press, 1981–

Pages 354-355
On the mirror-play of the fourfold

Pages 356-357
Shaking up a whole culture

Pages 358-359
Cornerstone and crossroads

Pages 360-361
A deep impression embedded in stone

Pages 362-363
A certain Y, a certain V

Pages 364-365
The world is Zeus's play

Page 366
It was necessary to begin again

 

Sunday, January 24, 2010

Today’s Sermon

Filed under: General,Geometry — Tags: , — m759 @ 11:00 am

More Than Matter

Wheel in Webster’s Revised Unabridged Dictionary, 1913

(f) Poetry

The burden or refrain of a song.

⇒ “This meaning has a low degree of authority, but is supposed from the context in the few cases where the word is found.” Nares.

You must sing a-down a-down, An you call him a-down-a. O, how the wheel becomes it! Shak.

“In one or other of G. F. H. Shadbold’s two published notebooks, Beyond Narcissus and Reticences of Thersites, a short entry appears as to the likelihood of Ophelia’s enigmatic cry: ‘Oh, how the wheel becomes it!’ referring to the chorus or burden ‘a-down, a-down’ in the ballad quoted by her a moment before, the aptness she sees in the refrain.”

— First words of Anthony Powell’s novel “O, How the Wheel Becomes It!” (See Library Thing.)

Anthony Powell's 'O, How the Wheel Becomes It!' along with Laertes' comment 'This nothing's more than matter.'

Related material:

Photo uploaded on January 14, 2009
with caption “This nothing’s more than matter”

and the following nothings from this journal
on the same date– Jan. 14, 2009

The Fritz Leiber 'Spider' symbol in a square

A Singer 7-cycle in the Galois field with eight elements

The Eightfold (2x2x2) Cube

The Jewel in Venn's Lotus (photo by Gerry Gantt)

Saturday, January 23, 2010

For Baron Samedi

Filed under: General,Geometry — Tags: , — m759 @ 9:00 am

Yesterday's Times —

NY Times banner with Eve and apple

Today's Times —

NY Times ad for Goldstein's '36 Arguments'-- 'Deconstruct the Arguments'

   Annals of Deconstruction —

Click on image for background.

New Yorker cover on Haiti featuring Baron Samedi

Related material
   for Baron Samedi

The Found Symbol
Robert Langdon (played by Tom Hanks) and a corner of Solomon's Cube
Jacques Derrida on the Looking-Glass garden, 'The Time before First,' and Solomon's seal

Sunday, January 17, 2010

Welcome to the Ape Stuff

Filed under: General,Geometry — m759 @ 12:00 pm

NY Times obituary of Knox Burger,
book editor and agent, who died at 87 on January 4

"As a magazine editor in the 1950s, Knox Burger published Kurt Vonnegut’s first short story….

During Mr. Burger’s tenure at Collier’s, a short story by Vonnegut, whom he had known slightly when both were at Cornell and who was then working in public relations for General Electric, crossed his desk. He asked for changes, which Vonnegut made, and the story, 'Report on the Barnhouse Effect,' appeared in the magazine in February 1950. It was the first published work of fiction for Vonnegut, who recounted the episode decades later….

At least half a dozen authors… honored Mr. Burger by dedicating books to him. Vonnegut, who died in 2007, did, too. His dedication of Welcome to the Monkey House, a 1968 collection of short stories that included 'Report on the Barnhouse Effect,' read:

'To Knox Burger. Ten days older than I am. He has been a very good father to me.'"

A Jesuit at the
Gerard Manley Hopkins Archive

"Bisociation": The Act of Creation

"Koestler’s concept of ‘bisociation’… enters into the very ‘act of creation.’ In every such act, writes Koestler, the creator ‘bisociates,’ that is, combines, two ‘matrices’– two diverse patterns of knowing or perceiving– in a new way. As each matrix carries its own images, concepts, values, and ‘codes,’ the creative person brings together– ‘bisociates’– two diverse matrices not normally connected."

– Joseph J. Feeney, S.J.

Robert Stone in A Flag for Sunrise
(Knopf hardcover, 1981)–

"The eye you see him with is the same eye with which he sees you."

– Father Egan on page 333

Pablo on page 425–

"'…You know, he told me– that old man told me– the eye you look at it with, well, that's the eye it sees you with. That's what he told me.'

Holliwell was moved to recall an experiment he had once read about; he had clipped the report of it for his class. An experimenter endeavoring to observe chimpanzee behavior had fashioned a spy hole in the door of the animals' chamber through which he might watch them unobserved. Putting his eye to it, he had seen nothing more than what he finally identified as the eye of a chimpanzee on the other side of the door. Ape stuff."

More ape stuff from a Jesuit–

"This Jack, joke, poor potsherd, patch, matchwood, immortal diamond,
                Is immortal diamond."

— Gerard Manley Hopkins,
"That Nature is a Heraclitean Fire
and of the comfort of the Resurrection
"

More ape stuff from myself–

http://www.log24.com/log/pix10/100117-TradingPlaces.jpg

Problem: Perform this transformation
by combining the sorts of permutations allowed
in the diamond puzzle. A solution: click here.

Saturday, January 9, 2010

Positional Meaning

Filed under: General,Geometry — m759 @ 11:32 am

"The positional meaning of a symbol derives from its relationship to other symbols in a totality, a Gestalt, whose elements acquire their significance from the system as a whole."

— Victor Turner, The Forest of Symbols, Ithaca, NY, Cornell University Press, 1967, p. 51, quoted by Beth Barrie in "Victor Turner."

To everything, turn, turn, turn…
— Peter Seeger

The Galois Quaternion:

The Galois Quaternion

Click for context.

Wednesday, January 6, 2010

Brightness at Noon, continued

Filed under: General,Geometry — m759 @ 12:00 pm

The Galois Quaternion

From The French Mathematician
by Tom Petsinis (Nov. 30, 1998)–

0

I had foreseen it all in precise detail.
One step led inevitably to the next,
like the proof of a shining theorem,
down to the conclusive shot that still echoes
through time and space.
Facedown in the damp pine needles,
I embraced that fatal sphere
with my whole body. Dreams, memories,
even the mathematics I had cherished
and set down in my last will and testament–
all receded. I am reduced to
a singular point; in an instant
I am transformed to i.

i = an imaginary being

Here, on this complex space,
i am no longer the impetuous youth
who wanted to change the world
first with a formula and then with a flame.
Having learned the meaning of infinite patience,
i now rise to the text whenever anyone reads
about Evariste Galois, preferring to remain
just below the surface,
like a goldfish nibbling the fringe of a floating leaf.
Ink is more mythical than blood
(unless some ancient poet slit his
vein and wrote an epic in red):
The text is a two-way mirror
that allows me to look into
the life and times of the reader.
Who knows, someday i may rise
to a text that will compel me
to push through to the other side.
Do you want proof that i exist? Where am i?
Beneath every word, behind each letter,
on the side of a period that will never see the light.

 

Related material:
The Galois Quaternion

The Galois Quaternion

Click for context.
(See also Nativity and the end
of this morning's post.)

Epiphany Revisited

Filed under: General,Geometry — Tags: — m759 @ 9:00 am

January 06, 2007
ART WARS: Epiphany

Picture of Nothing
On Kirk Varnedoe’s
2003 Mellon Lectures,
Pictures of Nothing“–

“Varnedoe’s lectures were ultimately about faith, about his faith in the power of abstraction, and abstraction as a kind of anti-religious faith in itself….”

Related material:

The more industrious scholars will derive considerable pleasure from describing how the art-history professors and journalists of the period 1945-75, along with so many students, intellectuals, and art tourists of every sort, actually struggled to see the paintings directly, in the old pre-World War II way, like Plato’s cave dwellers watching the shadows, without knowing what had projected them, which was the Word.”

— Tom Wolfe, The Painted Word

Log24, Aug. 23, 2005:

“Concept (scholastics’ verbum mentis)–  theological analogy of Son’s procession  as Verbum Patris, 111-12″ — Index to Joyce and Aquinas, by William T. Noon, S.J., Yale University Press 1957,  second printing 1963, page 162

“So did God cause the big bang? Overcome by metaphysical lassitude, I finally reach over to my bookshelf for The Devil’s Bible. Turning to Genesis I read: ‘In the beginning there was nothing. And God said, ‘Let there be light!’ And there was still nothing, but now you could see it.'”
— Jim Holt, Big-Bang Theology, from Slate‘s “High Concept” department

'In the beginning' according to Jim Holt

“Bang.”

“…Mondrian and Malevich are not discussing canvas or pigment or graphite or any other form of matter. They are talking about Being or Mind or Spirit. From their point of view, the grid is a staircase to the Universal….”

For properties of the “nothing” represented by the 3×3 grid, see The Field of Reason. For religious material related to the above and to Epiphany, a holy day observed by some, see Plato, Pegasus, and the Evening Star and Shining Forth.


Some Context:

Quaternions in Finite Geometry

Click to enlarge.

See also Nativity.

Tuesday, January 5, 2010

Artifice of Eternity

Filed under: General,Geometry — Tags: — m759 @ 7:59 am

A Medal

In memory of Byzantine scholar Ihor Sevcenko,
who died at 87 on St. Stephen's Day, 2009–

The image “http://www.log24.com/log/pix06A/060915-Roots.gif” cannot be displayed, because it contains errors.

William Grimes on Sevcenko in this morning's New York Times:

"Perhaps his most fascinating, if uncharacteristic, literary contribution came shortly after World War II, when he worked with Ukrainians stranded in camps in Germany for displaced persons.

In April 1946 he sent a letter to Orwell, asking his permission to translate 'Animal Farm' into Ukrainian for distribution in the camps. The idea instantly appealed to Orwell, who not only refused to accept any royalties but later agreed to write a preface for the edition. It remains his most detailed, searching discussion of the book."

See also a rather different medal discussed
here in the context of an Orwellian headline from
The New York Times on Christmas morning,
the day before Sevcenko died.
That headline, at the top of the online front page,
was "Arthur Koestler, Man of Darkness."

Leibniz, design for medallion showing binary numbers as an 'imago creationis'

The medal, offered as an example of brightness
to counteract the darkness of the Times, was designed
by Leibniz in honor of his discovery of binary arithmetic.
See Brightness at Noon and Brightness continued.

"By groping toward the light we are made to realize
how deep the darkness is around us."
— Arthur Koestler, The Call Girls: A Tragi-Comedy,
Random House, 1973, page 118

Wednesday, December 30, 2009

Fearful Symmetry

Filed under: General,Geometry — m759 @ 4:12 pm

http://www.log24.com/log/pix09A/091230-Koestlerr-NYRB19641217.gif

Arthur Koestler by David Levine,
New York Review of Books,
December 17, 1964

A Jesuit at the
Gerard Manley Hopkins Archive
:

‘Bisociation’: The Act of Creation

Koestler’s concept of ‘bisociation’… enters into the very ‘act of creation.’ In every such act, writes Koestler, the creator ‘bisociates,’ that is, combines, two ‘matrices’– two diverse patterns of knowing or perceiving– in a new way. As each matrix carries its own images, concepts, values, and ‘codes,’ the creative person brings together– ‘bisociates’– two diverse matrices not normally connected.

— Joseph J. Feeney, S.J.

See also December 9, 2009:

The theme of the January 2010 issue of the
Notices of the American Mathematical Society
is “Mathematics and the Arts.”

Related material:

Adam and God (Sistine Chapel), with Jungian Self-Symbol and Ojo de Dios (The Diamond Puzzle)

Saturday, December 26, 2009

Annals of Philosophy

Filed under: General,Geometry — Tags: — m759 @ 12:00 pm

Towards a Philosophy of Real Mathematics, by David Corfield, Cambridge U. Press, 2003, p. 206:

"Now, it is no easy business defining what one means by the term conceptual…. I think we can say that the conceptual is usually expressible in terms of broad principles. A nice example of this comes in the form of harmonic analysis, which is based on the idea, whose scope has been shown by George Mackey (1992) to be immense, that many kinds of entity become easier to handle by decomposing them into components belonging to spaces invariant under specified symmetries."

For a simpler example of this idea, see the entities in The Diamond Theorem, the decomposition in A Four-Color Theorem, and the space in Geometry of the 4×4 Square.  The decomposition differs from that of harmonic analysis, although the subspaces involved in the diamond theorem are isomorphic to Walsh functions— well-known as discrete analogues of the trigonometric functions of traditional harmonic analysis.

Friday, December 25, 2009

Brightness at Noon

Filed under: General,Geometry — Tags: — m759 @ 12:00 pm

New York Times online front page
Christmas morning:

"Arthur Koestler, Man of Darkness"–

NY Times front page, Christmas morning 2009

The photo is of Koestler in 1931 on a zeppelin expedition to the North Pole.

"The Act of Creation is, I believe, a more truly creative work than any of Koestler’s novels….  According to him, the creative faculty in whatever form is owing to a circumstance which he calls ‘bisociation.’ And we recognize this intuitively whenever we laugh at a joke, are dazzled by a fine metaphor, are astonished and excited by a unification of styles, or ’see,’ for the first time, the possibility of a significant theoretical breakthrough in a scientific inquiry. In short, one touch of genius—or bisociation—makes the whole world kin. Or so Koestler believes.”

– Henry David Aiken, The Metaphysics of Arthur Koestler, New York Review of Books, Dec. 17, 1964

From Opus Postumum by Immanuel Kant, Eckart Förster, Cambridge U. Press, 1995, p. 260:

"In January 1697, Leibniz accompanied his New Year Congratulations to Rudolf August with the design of a medal with the duke's likeness on one side, and the 'image of Creation' in terms of the binary number system on the other. Concerning the inscription on this side, Leibniz writes: 'I have thought for a while about the Motto dell'impresa and finally have found it good to write this line: omnibus ex nihilo ducendis SUFFICIT UNUM [To make all things from nothing, UNITY SUFFICES], because it clearly indicates what is meant by the symbol, and why it is imago creationis' (G. F. Leibniz, Zwei Briefe über das binäre Zahlensystem und die chinesische Philosophie, ed. Renate Loosen and Franz Vonessen, Chr. Belser Verlag: Stuttgart 1968, p. 21)."

Leibniz, design for medallion showing binary numbers as an 'imago creationis'

Figure from Rudolf  Nolte’s
Gottfried Wilhelms Baron von Leibniz
Mathematischer Beweis der Erschaffung und
Ordnung der Welt in einem Medallion…

(Leipzig: J. C. Langenheim, 1734).

Leibniz, letter of 1697:

"And so that I won’t come entirely empty-handed this time, I enclose a design of that which I had the pleasure of discussing with you recently. It is in the form of a memorial coin or medallion; and though the design is mediocre and can be improved in accordance with your judgment, the thing is such, that it would be worth showing in silver now and unto future generations, if it were struck at your Highness’s command. Because one of the main points of the Christian Faith, and among those points that have penetrated least into the minds of the worldly-wise and that are difficult to make with the heathen is the creation of all things out of nothing through God’s omnipotence, it might be said that nothing is a better analogy to, or even demonstration of such creation than the origin of numbers as here represented, using only unity and zero or nothing. And it would be difficult to find a better illustration of this secret in nature or philosophy; hence I have set on the medallion design IMAGO CREATIONIS [in the image of creation]. It is no less remarkable that there appears therefrom, not only that God made everything from nothing, but also that everything that He made was good; as we can see here, with our own eyes, in this image of creation. Because instead of there appearing no particular order or pattern, as in the common representation of numbers, there appears here in contrast a wonderful order and harmony which cannot be improved upon….

Such harmonious order and beauty can be seen in the small table on the medallion up to 16 or 17; since for a larger table, say to 32, there is not enough room. One can further see that the disorder, which one imagines in the work of God, is but apparent; that if one looks at the matter with the proper perspective, there appears symmetry, which encourages one more and more to love and praise the wisdom, goodness, and beauty of the highest good, from which all goodness and beauty has flowed."

See also Parable.

Tuesday, December 22, 2009

New Finite Geometry Note

Filed under: General,Geometry — m759 @ 10:10 pm

Click screenshot to try the page:

Half-Circle Patterns

Sunday, December 20, 2009

The Test

Filed under: General,Geometry — m759 @ 11:00 am

Dies Natalis of
Emil Artin

From the September 1953 Bulletin of the American Mathematical Society

Emil Artin, in a review of Éléments de mathématique, by N. Bourbaki, Book II, Algebra, Chaps. I-VII–

"We all believe that mathematics is an art. The author of a book, the lecturer in a classroom tries to convey the structural beauty of mathematics to his readers, to his listeners. In this attempt he must always fail. Mathematics is logical to be sure; each conclusion is drawn from previously derived statements. Yet the whole of it, the real piece of art, is not linear; worse than that its perception should be instantaneous. We all have experienced on some rare occasions the feeling of elation in realizing that we have enabled our listeners to see at a moment's glance the whole architecture and all its ramifications. How can this be achieved? Clinging stubbornly to the logical sequence inhibits the visualization of the whole, and yet this logical structure must predominate or chaos would result."

Art Versus Chaos

http://www.log24.com/log/pix09A/091220-ForakisHypercube.jpg
From an exhibit,
"Reimagining Space
"

The above tesseract (4-D hypercube)
sculpted in 1967 by Peter Forakis
provides an example of what Artin
called "the visualization of the whole."

For related mathematical details see
Diamond Theory in 1937.

"'The test?' I faltered, staring at the thing.
'Yes, to determine whether you can live
in the fourth dimension or only die in it.'"
Fritz Leiber, 1959

See also the Log24 entry for
Nov. 26,  2009, the date that
Forakis died.

"There is such a thing
as a tesseract."
Madeleine L'Engle, 1962

Monday, December 14, 2009

Peer Review at Wikipedia

Filed under: General,Geometry — m759 @ 5:40 pm

Recent Wikipedia activity in the area of finite geometry–

A list, complete up to now, of all Wikipedia changes made by anonymous user Marconet:

Note that all these items are related to changes in links that lead to my own web pages– with one exception, rather technical pages on finite geometry.

A list, complete up to now, of all Wikipedia changes made by anonymous user Greenfernglade:

Again, all these items are related to changes (in this case, deletions) in links that lead to my own web pages. Greenfernglade may or may not be the same person as Marconet. Neither one has a user home page at Wikipedia, but use of the pseudonyms has apparently served to cover up the IP address(es?) of the changes’ originator(s?).

For similar changes in the past, see my “user talk” page at Wikipedia. As I noted there on May 31, 2007, “There seems little point in protesting the deletions while Wikipedia still allows any anonymous user to change their articles.”

Saturday, December 12, 2009

For Sinatra’s Birthday

Filed under: General,Geometry — m759 @ 2:02 pm

Today's previous entry quoted a review by Edward Rothstein of Jung's The Red Book. The entry you are now reading quotes a review by Jim Holt of a notable book by Rothstein:

The Golden Book

Rothstein's 'Emblems of Mind,' 1995, cover illustrations by Pinturicchio from Vatican

Cover illustration— Arithmetic and Music,
Borgia Apartments, The Vatican

Jim Holt reviewing Edward Rothstein's Emblems of Mind: The Inner Life of Music and Mathematics in The New Yorker of June 5, 1995:

Advent

"The fugues of Bach, the symphonies of Haydn, the sonatas of Mozart: these were explorations of ideal form, unprofaned by extramusical associations. Such 'absolute music,' as it came to be called, had sloughed off its motley cultural trappings. It had got in touch with its essence. Which is why, as Walter Pater famously put it, 'all art constantly aspires towards the condition of music.'

The only art that can rival music for sheer etheriality is mathematics. A century or so after the advent of absolute music, mathematics also succeeded in detaching itself from the world. The decisive event was the invention of strange, non-Euclidean geometries, which put paid to the notion that the mathematician was exclusively, or even primarily, concerned with the scientific universe. 'Pure' mathematics came to be seen by those who practiced it as a free invention of the imagination, gloriously indifferent to practical affairs– a quest for beauty as well as truth."

Related material: Hardy's Apology, Non-Euclidean Blocks, and The Story Theory of Truth.

See also Holt on music and emotion:

http://www.log24.com/log/pix09A/091212-MandM-review.gif

"Music does model… our emotional life… although
  the methods by which it does so are 'puzzling.'"

Also puzzling: 2010 AMS Notices.

Wednesday, December 9, 2009

2010 AMS Notices

Filed under: General,Geometry — m759 @ 7:00 pm

The theme of the January 2010 issue of the
Notices of the American Mathematical Society
is "Mathematics and the Arts."

Related material:

Adam and God (Sistine Chapel), with Jungian Self-Symbol and Ojo de Dios (The Diamond Puzzle)

The Diamond Puzzle
may be downloaded by
  viewing it in Internet Explorer
and saving it in the
"web archive" (*.mht) format.

Saturday, December 5, 2009

Holiday Book

Filed under: General,Geometry — Tags: — m759 @ 10:00 pm

Time and Chance, continued…

NY Lottery numbers today–
Midday 401, Evening 717  

_________________________________________________

From this journal on 4/01, 2009:

The Cruelest Month

Fictional Harvard professor of symbology Robert Langdon, as portrayed by Tom Hanks

"Langdon sensed she was
      toying with him…."

Dan Brown

___________________________________________

 

From this journal on 7/17, 2008:

Jung’s four-diamond figure from
Aiona symbol of the self

Jung's four-diamond figure showing transformations of the self as Imago Dei

Jung’s Map of the Soul,
by Murray Stein:

“… Jung thinks of the self as undergoing continual transformation during the course of a lifetime…. At the end of his late work Aion, Jung presents a diagram to illustrate the dynamic movements of the self….”

For related dynamic movements,
see the Diamond 16 Puzzle
and the diamond theorem.

______________________________________________
 
A piece related to both of the above posts–
 
"The Symbologist," a review, respectful despite the editor's sarcastic title, of Jung's Red Book in the December 6th New York Times Book Review.

Friday, December 4, 2009

Parallelism

Filed under: General,Geometry — m759 @ 12:00 am

From Peter J. Cameron's
Parallelisms of Complete Designs (pdf)–

Epigraph by Eliot on Little Gidding in Cameron's 'Parallelisms'

"…the Feast of Nicholas Ferrar
  is kept on the 4th December."

Little Gidding Church

Cameron's is the usual definition
of the term "non-Euclidean."
I prefer a more logical definition.

Sunday, November 15, 2009

A Sermon for Hogwarts

Filed under: General,Geometry — m759 @ 9:00 am

Part I: The Search

Part II: The Rock

Related metaphors–

Three Tales

Related illustration–

The Dome of the Rock:

Dome of the Rock on NY Times online front page, 7:10 AM ET Sunday, Nov. 15, 2009

Saturday, November 14, 2009

Mathematics and Narrative, continued:

Filed under: General,Geometry — Tags: , , , , — m759 @ 10:10 pm

A graphic novel reviewed in the current Washington Post  features Alfred North Whitehead and Bertrand Russell–

Whitehead and Russell, 'Logicomix' page 181

Related material:

Whitehead on Fano's finite projective three-space:

"This is proved by the consideration of a three dimensional geometry in which there are only fifteen points."

The Axioms of Projective Geometry , Cambridge University Press, 1906

A related affine six-space:

Grey cube, 4x4x4

Further reading:

See Solomon's Cube and the link at the end of today's previous entry, then compare and contrast the above portraits of Whitehead and Russell with Charles Williams's portraits of Sir Giles Tumulty and Lord Arglay in the novel Many Dimensions .

"It was a dark and stormy night…."

Wednesday, November 11, 2009

Triptych

Filed under: General,Geometry — Tags: , — m759 @ 10:31 am

Triptych: 'Look at the Birdie,' 'A Wind in the Door,' and 'Diamond Theory'

Related material:

"Harrowing cuteness,"* The Eden Express, and a search on "harrowing" in this journal

* Perhaps a typo, but still a memorable phrase.

Tuesday, November 10, 2009

Out of Inland

Filed under: General,Geometry — m759 @ 11:02 am

Epigraphs at
Peter Cameron’s home page:

Quotes from 'The Hawkline Monster' and 'Riddley Walker'

See also the epigraphs in Cameron’s
Parallelisms of Complete Designs,
entries on this date three years ago,
Russell Hoban in this journal,
and
The Hawkline Monster in this journal.

Sunday, November 8, 2009

H is for Hogwarts, continued

Filed under: General,Geometry — Tags: — m759 @ 9:48 am

A Sequel to Koestler's
The Call Girls

Gilles Deleuze, Negotiations 1972-1990,
Columbia University Press paperback, 1997, p. 137–

"Academics' lives are seldom interesting."

But then there is Matt Lee of the University of Greenwich.

See his weblog subtitled "notes and thoughts on philosophy"… particularly his post "Diamond time, daimon time," of August 20, 2009.

See also my own post of August 20, 2009– "Sophists"– and my earlier post "Daimon Theory" of March 12, 2003:


Daimon Theory


Diamond Theory

More about Lee:

"Chaos majik is a form of modern witchcraft."

More about magick:

Noetic Symbology
(Log24 on October 25, 2009)

Some Related Log24 Posts

Wednesday, November 4, 2009

Sinner or Saint?

Filed under: General,Geometry — Tags: , — m759 @ 10:31 am

As noted here yesterday, Claude Levi-Strauss may have died on Devil's Night, on Halloween, or on All Saints' Day. He was apparently a myth-transformer to the end.

The Independent says today he died on Sunday, All Saints' Day. Its eulogy, by Adam Kuper, is well-written, noting that linguist Roman Jakobson was a source of Levi-Strauss's theory of oppositions in myth, and observing that

"… binary oppositions tend to accumulate to form structures…."

Yes, they do. Examples:

I. The structures in the Diamond Puzzle

Adam and God (Sistine Chapel), with Jungian Self-Symbol and Ojo de Dios (The Diamond Puzzle)

Click on image for Jungian background.

II: The structure on a recent cover of Semiotica

http://www.log24.com/log/pix09A/091103-SemioticaSm.jpg

Click to enlarge.

The Semiotica article by mathematical linguist Solomon Marcus is a defense of the Levi-Strauss canonic formula mentioned here yesterday.

It is available online for $40.

A less expensive, and possibly more informative, look at oppositions in linguistics is available for free online in a 1984 master's thesis (pdf, 8+ mb)–

"Language, Linguistics, and Philosophy: A Comparison of the Work of Roman Jakobson and the Later Wittgenstein, with Some Attention to the Philosophy of Charles Saunders Peirce," by Miles Spencer Kimball.

Tuesday, November 3, 2009

Summa Mythologica

Filed under: General,Geometry — Tags: , , — m759 @ 10:10 pm

Book review by Jadran Mimica in Oceania, Vol. 74, 2003:

"In his classic essay of 1955 'The Structural Study of Myth' Levi-Strauss came up with a universal formula of mythopeic dynamics

[fx(a) : fy(b) :: fx(b) : fa-1(y)]

that he called canonical 'for it can represent any mythic transformation'. This formulation received its consummation in the four massive Mythologiques volumes, the last of which crystallises the fundamental dialectics of mythopoeic thought: that there is 'one myth only' and the primal ground of this 'one' is 'nothing'. The elucidation of the generative matrix of the myth-work is thus completed as is the self-totalisation of both the thinker and his object."

So there.

At least one mathematician has claimed that the Levi-Strauss formula makes sense. (Jack Morava, arXiv pdf, 2003.)

I prefer the earlier (1943) remarks of Hermann Hesse on transformations of myth:

"…in the spirit of the Glass Bead Game, everything actually was all-meaningful, that every symbol and combination of symbols led not hither and yon, not to single examples, experiments, and proofs, but into the center, the mystery and innermost heart of the world, into primal knowledge. Every transition from major to minor in a sonata, every transformation of a myth or a religious cult, every classical or artistic formulation was, I realized in that flashing moment, if seen with a truly meditative mind, nothing but a direct route into the interior of the cosmic mystery, where in the alternation between inhaling and exhaling, between heaven and earth, between Yin and Yang, holiness is forever being created."

Sunday, November 1, 2009

October Endgame

Filed under: General,Geometry — Tags: — m759 @ 8:28 am

Suggested by the New York State lottery numbers on All Hallows' Eve–

430 (mid-day) and 168 (evening)…

From 430 as a date, 4/30Beyond Grief and Nothing: A Reading of Don DeLillo, by Joseph Dewey, University of South Carolina Press, 2006, page 123:

"It is as if DeLillo himself had moved to an endgame…."

For such an endgame, see yesterday's link to a Mira Sorvino drama. The number 168 suggested by the Halloween lottery deals with the properties of space itself and requires a more detailed exegesis… For the full picture, consider the Log24 entries of Feb. 16-28 this year, esp. the entries of Feb. 27 and the phrase they suggest–

Flores, Flores para los muertos.

Consider also Xinhua today, with its discussion of rocket science and seal-cutting:

http://www.log24.com/log/pix09A/091101-XinhuaDetail.jpg

Click image for context.

For space technology, see the above link to Feb. 16-28 this year as well as the following (click on image for details)–

http://www.log24.com/log/pix09A/091101-SF-PynchonPanel.jpg

As for seal-cutting, see the following seal from a Korean Christian site:

http://www.log24.com/log/pix09A/091101-Seal.jpg

See Mizian Translation Service for some background on the seal's designer.

Saturday, October 24, 2009

Chinese Cubes Continued

Filed under: General,Geometry — m759 @ 8:28 am

A search for “Chinese Cube” (based on the the previous entry’s title) reveals the existence of a most interesting character, who…

“… has attempted in his books to produce a Science and Art of Reasoning using the simplest of the Platonic solids, the Cube. [His] model also parallels, in some ways, the Cube of Space constructed from the Sepher Yetzirah’s attributions for the Hebrew letters and their direction. [He] elucidated his theories at great length….”

More…

For related remarks, see the link to Solomon’s Cube from the previous entry.

Then of course there is…

http://www.log24.com/log/pix09A/091024-RayFigure.jpg

Click on figure for details.

Thursday, October 22, 2009

Chinese Cubes

Filed under: General,Geometry — Tags: , — m759 @ 12:00 am

From the Bulletin of the American Mathematical Society, Jan. 26, 2005:

What is known about unit cubes
by Chuanming Zong, Peking University

Abstract: Unit cubes, from any point of view, are among the simplest and the most important objects in n-dimensional Euclidean space. In fact, as one will see from this survey, they are not simple at all….

From Log24, now:

What is known about the 4×4×4 cube
by Steven H. Cullinane, unaffiliated

Abstract: The 4×4×4 cube, from one point of view, is among the simplest and the most important objects in n-dimensional binary space. In fact, as one will see from the links below, it is not simple at all.

Solomon's Cube

The Klein Correspondence, Penrose Space-Time, and a Finite Model

Non-Euclidean Blocks

Geometry of the I Ching

Related material:

Monday's entry Just Say NO and a poem by Stevens,

"The Well Dressed Man with a Beard."

Monday, October 19, 2009

Hitchcock for Lithgow

Filed under: General,Geometry — m759 @ 12:00 pm

Modernity: A Film by
Alfred Hitchcock
:

“… the most thoroughgoing modernist design element in Hitchcock’s films arises out of geometry, as Francois Regnault has argued, identifying ‘a global movement for each one, or a “principal geometric or dynamic form,” which can appear in the pure state in the credits….'” –Peter J. Hutchings (my italics)

John Lithgow
is 64 today.

Happy birthday.

http://www.log24.com/log/pix09A/091019-GrayCube.jpg

Friday, October 16, 2009

Noncontinuous Groups

Filed under: General,Geometry — m759 @ 11:30 am

A page with this title has been added to my finite-geometry site.

(For the first version of that site, see a web page cached on August 15, 2000; compare with Ivars Peterson’s August 28, 2000, column “Scrambled Grids.” These pieces are clearly intended for two different audiences, but there is a certain similarity in the subject matter.)

Wednesday, October 14, 2009

Wednesday October 14, 2009

Filed under: General,Geometry — Tags: , — m759 @ 9:29 am

Singer 7-Cycles

Seven-cycles by R.T. Curtis, 1987

Singer 7-cycles by Cullinane, 1985

Click on images for details.

The 1985 Cullinane version gives some algebraic background for the 1987 Curtis version.

The Singer referred to above is James Singer. See his "A Theorem in Finite Projective Geometry and Some Applications to Number Theory," Transactions of the American Mathematical Society 43 (1938), 377-385.For other singers, see Art Wars and today's obituaries.

Some background: the Log24 entry of this date seven years ago, and the entries preceding it on Las Vegas and painted ponies.

Sunday, October 11, 2009

Sunday October 11, 2009

Filed under: General,Geometry — Tags: — m759 @ 7:00 pm
Concepts of Space

Today I revised the illustrations
in Finite Geometry of the
Square and Cube

for consistency in labeling
the eightfold cube.

Related material:

Inside the White Cube:
The Ideology of
the Gallery Space

Dagger Definitions

Monday, October 5, 2009

Monday October 5, 2009

Filed under: General,Geometry — m759 @ 4:00 am
Continued from Saturday— 

Pieces missing from Wechsler block design test and from IZZI puzzle

Context
for the 16:

Block Designs
and Art

Context
for the 70:

Symmetry
and Counting

  “Kunst ist nicht einfach.
— Sondheim in translation
 

Friday, October 2, 2009

Friday October 2, 2009

Filed under: General,Geometry — Tags: — m759 @ 6:00 am
Edge on Heptads

Part I: Dye on Edge

“Summary:
….we obtain various orbits of partitions of quadrics over GF(2a) by their maximal totally singular subspaces; the corresponding stabilizers in the relevant orthogonal groups are investigated. It is explained how some of these partitions naturally generalize Conwell’s heptagons for the Klein quadric in PG(5,2).”

Introduction:
In 1910 Conwell… produced his heptagons in PG(5,2) associated with the Klein quadric K whose points represent the lines of PG(3,2)…. Edge… constructed the 8 heptads of complexes in PG(3,2) directly. Both he and Conwell used their 8 objects to establish geometrically the isomorphisms SL(4,2)=A8 and O6(2)=S8 where O6(2) is the group of K….”

— “Partitions and Their Stabilizers for Line Complexes and Quadrics,” by R.H. Dye, Annali di Matematica Pura ed Applicata, Volume 114, Number 1, December 1977, pp. 173-194

Part II: Edge on Heptads

The Geometry of the Linear Fractional Group LF(4,2),” by W.L. Edge, Proc. London Math Soc., Volume s3-4, No. 1, 1954, pp. 317-342. See the historical remarks on the first page.

Note added by Edge in proof:
“Since this paper was finished I have found one by G. M. Conwell: Annals of Mathematics (2) 11 (1910), 60-76….”

Some context:

The Klein Correspondence,
Penrose Space-Time,
and a Finite Model

Wednesday, September 30, 2009

Wednesday September 30, 2009

Filed under: General,Geometry — Tags: — m759 @ 9:48 am

Midnight in the Garden, Autumn 2009

 

Review:

Der Einsatz
 
Motto of Plato's Academy: 'Let no one ignorant of geometry enter'
The Ninefold Square (a 3x3 grid)

The New York Times Magazine on Sunday, Sept. 20, 2009:
 
'The Holy Grail of the Unconscious' at The New York Times

From this journal on the following day, Sept. 21:

Pearl Jam 'Backspacer' album released Sept. 20, 2009

Happy birthday, Stephen King.

Today's previous entry is based on a song, "Unthought Known,"
from the above album; the cover of the album uses the 3×3 grid
shown in Sept. 20's midnight review. For related material
on the unconscious, see June 13-15, 2005.

I know more than Apollo,
For oft when he lies sleeping
I see the stars at mortal wars
In the wounded welkin weeping.

Tom O'Bedlam's Song

Sunday, September 27, 2009

Sunday September 27, 2009

Filed under: General,Geometry — Tags: — m759 @ 3:00 am
A Pleasantly
Discursive Treatment

In memory of Unitarian
minister Forrest Church,
 dead at 61 on Thursday:

NY Times Sept. 27, 2009, obituaries, featuring Unitarian minister Forrest Church

Unitarian Universalist Origins: Our Historic Faith

“In sixteenth-century Transylvania, Unitarian congregations were established for the first time in history.”

Gravity’s Rainbow–

“For every kind of vampire, there is a kind of cross.”

Unitarian minister Richard Trudeau

“… I called the belief that

(1) Diamonds– informative, certain truths about the world– exist

the ‘Diamond Theory’ of truth. I said that for 2200 years the strongest evidence for the Diamond Theory was the widespread perception that

(2) The theorems of Euclidean geometry are diamonds….

As the news about non-Euclidean geometry spread– first among mathematicians, then among scientists and philosophers– the Diamond Theory began a long decline that continues today.

Factors outside mathematics have contributed to this decline. Euclidean geometry had never been the Diamond Theory’s only ally. In the eighteenth century other fields had seemed to possess diamonds, too; when many of these turned out to be man-made, the Diamond Theory was undercut. And unlike earlier periods in history, when intellectual shocks came only occasionally, received truths have, since the eighteenth century, been found wanting at a dizzying rate, creating an impression that perhaps no knowledge is stable.

Other factors notwithstanding, non-Euclidean geometry remains, I think, for those who have heard of it, the single most powerful argument against the Diamond Theory*– first, because it overthrows what had always been the strongest argument in favor of the Diamond Theory, the objective truth of Euclidean geometry; and second, because it does so not by showing Euclidean geometry to be false, but by showing it to be merely uncertain.” —The Non-Euclidean Revolution, p. 255

H. S. M. Coxeter, 1987, introduction to Trudeau’s book

“There is a pleasantly discursive treatment of Pontius Pilate’s unanswered question ‘What is truth?’.”

As noted here on Oct. 8, 2008 (A Yom Kippur Meditation), Coxeter was aware in 1987 of a more technical use of the phrase “diamond theory” that is closely related to…

A kind
 of cross:

Diamond formed by four diagonally-divided two-color squares

See both
Theme and
Variations
and some more
poetic remarks,

Mirror-Play
 of the Fourfold.

* As recent Log24 entries have pointed out, diamond theory (in the original 1976 sense) is a type of non-Euclidean geometry, since finite geometry is not Euclidean geometry– and is, therefore, non-Euclidean, in the strictest sense (though not according to popular usage).

Sunday, September 20, 2009

Sunday September 20, 2009

Filed under: General,Geometry — Tags: , , — m759 @ 12:00 am

Der Einsatz

Motto of Plato's Academy: 'Let no one ignorant of geometry enter'

The 3x3 grid

Nichts ist wie es scheint.

Saturday, September 19, 2009

Saturday September 19, 2009

Filed under: General,Geometry — Tags: — m759 @ 4:23 pm

Old Year, Raus!

Also in today’s New York Times obituaries index:

 John T. Elson, Editor Who Asked
“Is God Dead?” at Time, Dies at 78

John T. Elson and Budd Schulberg

Wikipedia article on George Polya:

  • Look for a pattern
  • Draw a picture
  • Solve a simpler problem
  • Use a model
  • Work backward

From the date of Elson’s death:

Cube, 4x4x4

Four coloring pencils, of four different colors

Related material:
A Four-Color Theorem.”

Thursday, September 17, 2009

Thursday September 17, 2009

Filed under: General,Geometry — Tags: , — m759 @ 8:00 pm
Jennifer's Body

The following remark this evening by Ann Hornaday of The Washington Post serves as an instant review of today's previous cinematic Log24 offering starring the late Patrick Swayze:

"Watch it, forget it, move on."

A perhaps more enduring tribute:

Patrick Swayze in 'King Solomon's Mines'

 

 

Related material:

Solomon's Cube,
Solomon and Sheba,
and
Raiders of the Lost Stone.

"Ready when you are, C.B."

 

 

Thursday September 17, 2009

Filed under: General,Geometry — Tags: , — m759 @ 11:07 am
Symbologist Robert Langdon and a corner of Solomon's Cube

Patrick Swayze and Jennifer Grey in  'Dirty Dancing'

“Nobody puts Baby in a corner.”

Wednesday, September 16, 2009

Wednesday September 16, 2009

Filed under: General,Geometry — Tags: , — m759 @ 11:07 am
The Found Symbol
Robert Langdon (played by Tom Hanks) and a corner of Solomon's Cube
Jacques Derrida on the Looking-Glass garden, 'The Time before First,' and Solomon's seal

Monday, September 14, 2009

Monday September 14, 2009

Filed under: General,Geometry — Tags: — m759 @ 3:09 pm
Figure

Generating permutations for the Klein simple group of order 168 acting on the eightfold cube

The Sept. 8 entry on non-Euclidean* blocks ended with the phrase “Go figure.” This suggested a MAGMA calculation that demonstrates how Klein’s simple group of order 168 (cf. Jeremy Gray in The Eightfold Way) can be visualized as generated by reflections in a finite geometry.

* i.e., other than Euclidean. The phrase “non-Euclidean” is usually applied to only some of the geometries that are not Euclidean. The geometry illustrated by the blocks in question is not Euclidean, but is also, in the jargon used by most mathematicians, not “non-Euclidean.”

Friday, September 11, 2009

Friday September 11, 2009

Filed under: General,Geometry — Tags: — m759 @ 2:56 am
Theology
 in memory of
physicist Aage Bohr,
who died at 87 on
Tuesday, Sept. 8, 2009

Swarthmore physics honors thesis, 136 pp., 2007–

Abstract:

"Quantum mechanics, which has no completely accepted interpretation but many seemingly strange physical results, has been interpreted in a number of bizarre and fascinating ways over the years. The two interpretations examined in this paper, [Aage] Bohr and [Ole] Ulfbeck's 'Genuine Fortuitousness' and Stuckey, Silberstein, and Cifone's 'Relational Blockworld,' seem to be two such strange interpretations; Genuine Fortuitousness posits that causality is not fundamental to the universe, and Relational Blockworld suggests that time does not act as we perceive it to act. In this paper, I analyze these two interpretations…."

Footnote 55, page 114:
 
"Thus far, I have been speaking in fairly abstract terms, which can sometimes be unhelpful on the issue of explaining anything about the structure of space-time. I want to pause for a moment to suggest a new potential view of the blockworld within a 'genuinely fortuitous' universe in more visual terms. Instead of the 'static spacetime jewel' of blockworld that is often invoked by eternalists to help their readers conceptualize of what a blockworld would 'look like' from the outside, now imagine that a picture on a slide is being projected onto the surface of this space-time jewel."

Interpolated figure
from Log24:

 

Juliette Binoche in 'Blue'  The 24 2x2 Cullinane Kaleidoscope animated images

Cf. August 5, 2009.


From the perspective of one inside the jewel, one might ask 'Why is this section blue while this section is black?,' and from within the jewel, one could not formulate an answer since one could not see the entire picture projected on the jewel; however, from outside the jewel, an observer (some analogue of Newton's God, perhaps, looking down on his 'sensorium' from the 5th dimension) could easily see the pattern and understand that all of the 'genuinely fortuitous' events inside the space-time jewel are, in fact, completely determined by the pattern in the projector."

— "Genuine Fortuitousness, Relational Blockworld, Realism, and Time" (pdf), by Daniel J. Peterson, Honors Thesis, Swarthmore College, December 13, 2007

Tuesday, September 8, 2009

Tuesday September 8, 2009

Filed under: General,Geometry — Tags: , , — m759 @ 12:25 pm

Froebel's   
Magic Box  
 

Box containing Froebel's Third Gift-- The Eightfold Cube
 
 Continued from Dec. 7, 2008,
and from yesterday.

 

Non-Euclidean
Blocks

 

Passages from a classic story:

… he took from his pocket a gadget he had found in the box, and began to unfold it. The result resembled a tesseract, strung with beads….

Tesseract
 Tesseract

 

"Your mind has been conditioned to Euclid," Holloway said. "So this– thing– bores us, and seems pointless. But a child knows nothing of Euclid. A different sort of geometry from ours wouldn't impress him as being illogical. He believes what he sees."

"Are you trying to tell me that this gadget's got a fourth dimensional extension?" Paradine demanded.
 
"Not visually, anyway," Holloway denied. "All I say is that our minds, conditioned to Euclid, can see nothing in this but an illogical tangle of wires. But a child– especially a baby– might see more. Not at first. It'd be a puzzle, of course. Only a child wouldn't be handicapped by too many preconceived ideas."

"Hardening of the thought-arteries," Jane interjected.

Paradine was not convinced. "Then a baby could work calculus better than Einstein? No, I don't mean that. I can see your point, more or less clearly. Only–"

"Well, look. Let's suppose there are two kinds of geometry– we'll limit it, for the sake of the example. Our kind, Euclidean, and another, which we'll call x. X hasn't much relationship to Euclid. It's based on different theorems. Two and two needn't equal four in it; they could equal y, or they might not even equal. A baby's mind is not yet conditioned, except by certain questionable factors of heredity and environment. Start the infant on Euclid–"

"Poor kid," Jane said.

Holloway shot her a quick glance. "The basis of Euclid. Alphabet blocks. Math, geometry, algebra– they come much later. We're familiar with that development. On the other hand, start the baby with the basic principles of our x logic–"

"Blocks? What kind?"

Holloway looked at the abacus. "It wouldn't make much sense to us. But we've been conditioned to Euclid."

— "Mimsy Were the Borogoves," Lewis Padgett, 1943


Padgett (pseudonym of a husband-and-wife writing team) says that alphabet blocks are the intuitive "basis of Euclid." Au contraire; they are the basis of Gutenberg.

For the intuitive basis of one type of non-Euclidean* geometry– finite geometry over the two-element Galois field– see the work of…


Friedrich Froebel
 (1782-1852), who
 invented kindergarten.

His "third gift" —

Froebel's Third Gift-- The Eightfold Cube
© 2005 The Institute for Figuring
 
Photo by Norman Brosterman
fom the Inventing Kindergarten
exhibit at The Institute for Figuring

Go figure.

* i.e., other than Euclidean

Monday, September 7, 2009

Monday September 7, 2009

Filed under: General,Geometry — Tags: , , — m759 @ 12:00 am

Magic Boxes

"Somehow it seems to fill my head with ideas– only I don't exactly know what they are!…. Let's have a look at the garden first!"

— A passage from Lewis Carroll's Through the Looking-Glass. The "garden" part– but not the "ideas" part– was quoted by Jacques Derrida in Dissemination in the epigraph to Chapter 7, "The Time before First."

Commentary
 on the passage:

Part I    "The Magic Box,"  shown on Turner Classic Movies earlier tonight

Part II: "Mimsy Were the Borogoves," a classic science fiction story:

"… he lifted a square, transparent crystal block, small enough to cup in his palm– much too small to contain the maze of apparatus within it. In a moment Scott had solved that problem. The crystal was a sort of magnifying glass, vastly enlarging the things inside the block. Strange things they were, too. Miniature people, for example– They moved. Like clockwork automatons, though much more smoothly. It was rather like watching a play."

Part III:  A Crystal Block

Cube, 4x4x4

Four coloring pencils, of four different colors

Image of pencils is by
Diane Robertson Design.

Related material:
"A Four-Color Theorem."

Part IV:

David Carradine displays a yellow book-- the Princeton I Ching.

"Click on the Yellow Book."

Sunday, September 6, 2009

Sunday September 6, 2009

Filed under: General,Geometry — Tags: , — m759 @ 11:18 pm
Magic Boxes

Part I: “The Magic Box,” shown on Turner Classic Movies tonight

Part II: “Mimsy Were the Borogoves,” a classic science fiction story:

“… he lifted a square, transparent crystal block, small enough to cup in his palm– much too small to contain the maze of apparatus within it. In a moment Scott had solved that problem. The crystal was a sort of magnifying glass, vastly enlarging the things inside the block. Strange things they were, too. Miniature people, for example–

They moved. Like clockwork automatons, though much more smoothly. It was rather like watching a play.”

http://www.log24.com/log/pix09A/GridCube165C2.jpg

http://www.log24.com/log/pix09A/090906-Pencils.jpg

Image of pencils is by
Diane Robertson Design.

Related material:
A Four-Color Theorem.”

Saturday, September 5, 2009

Saturday September 5, 2009

Filed under: General,Geometry — Tags: , , — m759 @ 10:31 pm
For the
Burning Man

'The Stars My Destination,' current edition (with cover slightly changed)

(Cover slightly changed.)

 
Background —

 
SAT
 
Part I:

Sophists (August 20th)

Part II:

VERBUM
SAT
SAPIENTI

Escher's 'Verbum'

Escher's Verbum


Solomon's Cube



Part III:

From August 25th

Equilateral triangle on a cube, each side's length equal to the square root of two

"Boo, boo, boo,
  square root of two.
"

Thursday, September 3, 2009

Thursday September 3, 2009

Filed under: General,Geometry — Tags: , , — m759 @ 11:07 am
Autistic Enchantment

“Music and mathematics are among the pre-eminent wonders of the race. Levi-Strauss sees in the invention of melody ‘a key to the supreme mystery’ of man– a clue, could we but follow it, to the singular structure and genius of the species. The power of mathematics to devise actions for reasons as subtle, witty, manifold as any offered by sensory experience and to move forward in an endless unfolding of self-creating life is one of the strange, deep marks man leaves on the world. Chess, on the other hand, is a game in which thirty-two bits of ivory, horn, wood, metal, or (in stalags) sawdust stuck together with shoe polish, are pushed around on sixty-four alternately coloured squares. To the addict, such a description is blasphemy. The origins of chess are shrouded in mists of controversy, but unquestionably this very ancient, trivial pastime has seemed to many exceptionally intelligent human beings of many races and centuries to constitute a reality, a focus for the emotions, as substantial as, often more substantial than, reality itself. Cards can come to mean the same absolute. But their magnetism is impure. A mania for whist or poker hooks into the obvious, universal magic of money. The financial element in chess, where it exists at all, has always been small or accidental.

To a true chess player, the pushing about of thirty-two counters on 8×8 squares is an end in itself, a whole world next to which that of a mere biological or political or social life seems messy, stale, and contingent. Even the patzer, the wretched amateur who charges out with his knight pawn when the opponent’s bishop decamps to R4, feels this daemonic spell. There are siren moments when quite normal creatures otherwise engaged, men such as Lenin and myself, feel like giving up everything– marriage, mortgages, careers, the Russian Revolution– in order to spend their days and nights moving little carved objects up and down a quadrate board. At the sight of a set, even the tawdriest of plastic pocket sets, one’s fingers arch and a coldness as in a light sleep steals over one’s spine. Not for gain, not for knowledge or reknown, but in some autistic enchantment, pure as one of Bach’s inverted canons or Euler’s formula for polyhedra.”

— George Steiner in “A Death of Kings,” The New Yorker, issue dated September 7, 1968, page 133

“Examples are the stained-glass windows of knowledge.” —Nabokov

Quaternion rotations in a finite geometry
Click above images for some context.

See also:

Log24 entries of May 30, 2006, as well as “For John Cramer’s daughter Kathryn”– August 27, 2009— and related material at Wikipedia (where Kathryn is known as “Pleasantville”).

Monday, August 31, 2009

Monday August 31, 2009

Filed under: General,Geometry — Tags: — m759 @ 5:24 pm

Ask a Stupid Question

continued from   
last Wednesday…

 Log24 on August 26

"Did you see more glass?"


http://www.log24.com/log/pix09A/090831-GlassMemorial.jpg

Wednesday, August 26,
was the date of death
for Hyman Bloom.

Bloom, described in
today's New York Times
as "a painter of the
 mystical," died at 96.
 
Bloom often painted portraits of imaginary rabbis; an article titled "American Mystic" describes
 
"… the mesmerizing paradox at the heart of the rabbi portraits– they remember keepers of a tradition in a method that tradition expressly forbids. As Bloom explains, age and illness endowing his voice with a hoarse, prophetic quality, 'Jewish culture has nothing to do with painting. That’s a rule, "Thou shalt not make an image of anything in the air or on the earth."'"
 
– Stephen Vider, Tablet Magazine, February 28. 2007

Related material:

An entry in this journal linked to twice on the date of Bloom's death–
Art and Man at Yale

and an illustrated entry from this journal on the date of the "Mystic" article–
Elements of Geometry.

"So, there is one place
where modernism triumphs.
As in the cases of the pyramids
and the Taj Mahal, the Siegfried line
 and the Atlantic wall, death always
 calls on the very best architects."
 – J. G. Ballard,
"A Handful of Dust"

Tuesday, August 25, 2009

Tuesday August 25, 2009

Filed under: General,Geometry — Tags: — m759 @ 12:00 pm
 
DOWN
AT THE
DINGHY
 
(continued from
  January 10th)

Equilateral triangle, each side's length equal to the square root of two

"Boo, boo, boo,
  square root of two.
"

 

Thursday, August 20, 2009

Thursday August 20, 2009

Filed under: General,Geometry — m759 @ 4:00 pm

Sophists

From David Lavery’s weblog today

Kierkegaard on Sophists:

“If the natural sciences had been developed in Socrates’ day as they are now, all the sophists would have been scientists. One would have hung a microscope outside his shop in order to attract customers, and then would have had a sign painted saying: Learn and see through a giant microscope how a man thinks (and on reading the advertisement Socrates would have said: that is how men who do not think behave).”

— Søren Kierkegaard, Journals, edited and translated by Alexander Dru

To anyone familiar with Pirsig’s classic Zen and the Art of Motorcycle Maintenance, the above remarks of Kierkegaard ring false. Actually, the sophists as described by Pirsig are not at all like scientists, but rather like relativist purveyors of postmodern literary “theory.” According to Pirsig, the scientists are like Plato (and hence Socrates)– defenders of objective truth.

Pirsig on Sophists:

“The pre-Socratic philosophers mentioned so far all sought to establish a universal Immortal Principle in the external world they found around them. Their common effort united them into a group that may be called Cosmologists. They all agreed that such a principle existed but their disagreements as to what it was seemed irresolvable. The followers of Heraclitus insisted the Immortal Principle was change and motion. But Parmenides’ disciple, Zeno, proved through a series of paradoxes that any perception of motion and change is illusory. Reality had to be motionless.

The resolution of the arguments of the Cosmologists came from a new direction entirely, from a group Phædrus seemed to feel were early humanists. They were teachers, but what they sought to teach was not principles, but beliefs of men. Their object was not any single absolute truth, but the improvement of men. All principles, all truths, are relative, they said. ‘Man is the measure of all things.’ These were the famous teachers of ‘wisdom,’ the Sophists of ancient Greece.

To Phaedrus, this backlight from the conflict between the Sophists and the Cosmologists adds an entirely new dimension to the Dialogues of Plato. Socrates is not just expounding noble ideas in a vacuum. He is in the middle of a war between those who think truth is absolute and those who think truth is relative. He is fighting that war with everything he has. The Sophists are the enemy.

Now Plato’s hatred of the Sophists makes sense. He and Socrates are defending the Immortal Principle of the Cosmologists against what they consider to be the decadence of the Sophists. Truth. Knowledge. That which is independent of what anyone thinks about it. The ideal that Socrates died for. The ideal that Greece alone possesses for the first time in the history of the world. It is still a very fragile thing. It can disappear completely. Plato abhors and damns the Sophists without restraint, not because they are low and immoral people… there are obviously much lower and more immoral people in Greece he completely ignores. He damns them because they threaten mankind’s first beginning grasp of the idea of truth. That’s what it is all about.

The results of Socrates’ martyrdom and Plato’s unexcelled prose that followed are nothing less than the whole world of Western man as we know it. If the idea of truth had been allowed to perish unrediscovered by the Renaissance it’s unlikely that we would be much beyond the level of prehistoric man today. The ideas of science and technology and other systematically organized efforts of man are dead-centered on it. It is the nucleus of it all.

And yet, Phaedrus understands, what he is saying about Quality is somehow opposed to all this. It seems to agree much more closely with the Sophists.”

I agree with Plato’s (and Rebecca Goldstein’s) contempt for relativists. Yet Pirsig makes a very important point. It is not the scientists but rather the storytellers (not, mind you, the literary theorists) who sometimes seem to embody Quality.

As for hanging a sign outside the shop, I suggest (particularly to New Zealand’s Cullinane College) that either or both of the following pictures would be more suggestive of Quality than a microscope:

Alfred Bester covers showing 'primordial protomatter' (altered here) from 'Stars' and Rogue Winter from 'Deceivers'

For the “primordial protomatter”
in the picture at left, see
The Diamond Archetype.

Wednesday, August 19, 2009

Wednesday August 19, 2009

Filed under: General,Geometry — Tags: — m759 @ 7:00 pm
From Visualizing GL(2,p)
to Visualizing GL(2,Z)

A note from 1985 leads,
via today’s earlier entry,
to an article from 1993:

Visualizing Toral Automorphisms-- The opening paragraphs
See also
 Arnold’s Cat Map.

Wednesday August 19, 2009

Filed under: General,Geometry — Tags: , , — m759 @ 10:30 am

Group Actions, 1984-2009

From a 1984 book review:

"After three decades of intensive research by hundreds of group theorists, the century old problem of the classification of the finite simple groups has been solved and the whole field has been drastically changed. A few years ago the one focus of attention was the program for the classification; now there are many active areas including the study of the connections between groups and geometries, sporadic groups and, especially, the representation theory. A spate of books on finite groups, of different breadths and on a variety of topics, has appeared, and it is a good time for this to happen. Moreover, the classification means that the view of the subject is quite different; even the most elementary treatment of groups should be modified, as we now know that all finite groups are made up of groups which, for the most part, are imitations of Lie groups using finite fields instead of the reals and complexes. The typical example of a finite group is GL(n, q), the general linear group of n dimensions over the field with q elements. The student who is introduced to the subject with other examples is being completely misled."

— Jonathan L. Alperin,
   review of books on group theory,
   Bulletin (New Series) of the American
   Mathematical Society
10 (1984) 121, doi:
   10.1090/S0273-0979-1984-15210-8
 

A more specific example:


Actions of GL(2,3) on a 3x3 coordinate-array

The same example
at Wolfram.com:

Ed Pegg Jr.'s program at Wolfram.com to display a large number of actions of small linear groups over finite fields

Caption from Wolfram.com:
 
"The two-dimensional space Z3×Z3 contains nine points: (0,0), (0,1), (0,2), (1,0), (1,1), (1,2), (2,0), (2,1), and (2,2). The 48 invertible 2×2 matrices over Z3 form the general linear group known as GL(2, 3). They act on Z3×Z3 by matrix multiplication modulo 3, permuting the nine points. More generally, GL(n, p) is the set of invertible n×n matrices over the field Zp, where p is prime. With (0, 0) shifted to the center, the matrix actions on the nine points make symmetrical patterns."

Citation data from Wolfram.com:

"GL(2,p) and GL(3,3) Acting on Points"
 from The Wolfram Demonstrations Project,
 http://demonstrations.wolfram.com/GL2PAndGL33ActingOnPoints/,
 Contributed by: Ed Pegg Jr"

As well as displaying Cullinane's 48 pictures of group actions from 1985, the Pegg program displays many, many more actions of small finite general linear groups over finite fields. It illustrates Cullinane's 1985 statement:

"Actions of GL(2,p) on a p×p coordinate-array have the same sorts of symmetries, where p is any odd prime."

Pegg's program also illustrates actions on a cubical array– a 3×3×3 array acted on by GL(3,3). For some other actions on cubical arrays, see Cullinane's Finite Geometry of the Square and Cube.
 

Tuesday, August 18, 2009

Tuesday August 18, 2009

Filed under: General,Geometry — Tags: , , — m759 @ 12:00 pm

Prima Materia

(Background: Art Humor: Sein Feld (March 11, 2009) and Ides of March Sermon, 2009)

From Cardinal Manning's review of Kirkman's Philosophy Without Assumptions

"And here I must confess… that between something and nothing I can find no intermediate except potentia, which does not mean force but possibility."

— Contemporary Review, Vol. 28 (June-November, 1876), page 1017

Furthermore….

Cardinal Manning, Contemporary Review, Vol. 28, pages 1026-1027:

The following will be, I believe, a correct statement of the Scholastic teaching:–

1. By strict process of reason we demonstrate a First Existence, a First Cause, a First Mover; and that this Existence, Cause, and Mover is Intelligence and Power.

2. This Power is eternal, and from all eternity has been in its fullest amplitude; nothing in it is latent, dormant, or in germ: but its whole existence is in actu, that is, in actual perfection, and in complete expansion or actuality. In other words God is Actus Purus, in whose being nothing is potential, in potentia, but in Him all things potentially exist.

3. In the power of God, therefore, exists the original matter (prima materia) of all things; but that prima materia is pura potentia, a nihilo distincta, a mere potentiality or possibility; nevertheless, it is not a nothing, but a possible existence. When it is said that the prima materia of all things exists in the power of God, it does not mean that it is of the existence of God, which would involve Pantheism, but that its actual existence is possible.

4. Of things possible by the power of God, some come into actual existence, and their existence is determined by the impression of a form upon this materia prima. The form is the first act which determines the existence and the species of each, and this act is wrought by the will and power of God. By this union of form with the materia prima, the materia secunda or the materia signata is constituted.

5. This form is called forma substantialis because it determines the being of each existence, and is the root of all its properties and the cause of all its operations.

6. And yet the materia prima has no actual existence before the form is impressed. They come into existence simultaneously;

[p. 1027 begins]

as the voice and articulation, to use St. Augustine's illustration, are simultaneous in speech.

7. In all existing things there are, therefore, two principles; the one active, which is the form– the other passive, which is the matter; but when united, they have a unity which determines the existence of the species. The form is that by which each is what it is.

8. It is the form that gives to each its unity of cohesion, its law, and its specific nature.*

When, therefore, we are asked whether matter exists or no, we answer, It is as certain that matter exists as that form exists; but all the phenomena which fall under sense prove the existence of the unity, cohesion, species, that is, of the form of each, and this is a proof that what was once in mere possibility is now in actual existence. It is, and that is both form and matter.

When we are further asked what is matter, we answer readily, It is not God, nor the substance of God; nor the presence of God arrayed in phenomena; nor the uncreated will of God veiled in a world of illusions, deluding us with shadows into the belief of substance: much less is it catter [pejorative term in the book under review], and still less is it nothing. It is a reality, the physical kind or nature of which is as unknown in its quiddity or quality as its existence is certainly known to the reason of man.

* "… its specific nature"
        (Click to enlarge) —

Footnote by Cardinal Manning on Aquinas
The Catholic physics expounded by Cardinal Manning above is the physics of Aristotle.

 

 

For a more modern treatment of these topics, see Werner Heisenberg's Physics and Philosophy. For instance:

"The probability wave of Bohr, Kramers, Slater, however, meant… a tendency for something. It was a quantitative version of the old concept of 'potentia' in Aristotelian philosophy. It introduced something standing in the middle between the idea of an event and the actual event, a strange kind of physical reality just in the middle between possibility and reality."

Compare to Cardinal Manning's statement above:

"… between something and nothing I can find no intermediate except potentia…"

To the mathematician, the cardinal's statement suggests the set of real numbers between 1 and 0, inclusive, by which probabilities are measured. Mappings of purely physical events to this set of numbers are perhaps better described by applied mathematicians and physicists than by philosophers, theologians, or storytellers. (Cf. Voltaire's mockery of possible-worlds philosophy and, more recently, The Onion's mockery of the fictional storyteller Fournier's quantum flux. See also Mathematics and Narrative.)

Regarding events that are not purely physical– those that have meaning for mankind, and perhaps for God– events affecting conception, birth, life, and death– the remarks of applied mathematicians and physicists are often ignorant and obnoxious, and very often do more harm than good. For such meaningful events, the philosophers, theologians, and storytellers are better guides. See, for instance, the works of Jung and those of his school. Meaningful events sometimes (perhaps, to God, always) exhibit striking correspondences. For the study of such correspondences, the compact topological space [0, 1] discussed above is perhaps less helpful than the finite Galois field GF(64)– in its guise as the I Ching. Those who insist on dragging God into the picture may consult St. Augustine's Day, 2006, and Hitler's Still Point.

Monday, August 17, 2009

Monday August 17, 2009

Filed under: General,Geometry — m759 @ 9:48 pm
Design Theory,
continued

“… Kirkman has established an incontestable claim to be regarded as the founding father of the theory of designs.”

— “T.P. Kirkman, Mathematician,” by N.L. Biggs, Bulletin of the London Mathematical Society, Volume 13, Number 2 (March 1981), 97-120.

This paper is now available online for $12.

For more about this subject, see Design Theory, by Beth, Jungnickel, and Lenz, Cambridge U. Press, Volume I (2nd ed., 1999, 1120 pages) and Volume II (2nd ed., 2000, 513 pages).

For an apparently unrelated subject with the same name, see Graphic Design Theory: Readings from the Field, by Helen Armstrong (Princeton Architectural Press, 2009).

For what the two subjects have in common, see Block Designs in Art and Mathematics.

Sunday, August 16, 2009

Sunday August 16, 2009

Filed under: General,Geometry — Tags: , — m759 @ 12:00 pm
Return to Paradise

(Title of a New Yorker
essay dated June 2, 2008)

Kenneth Bacon, an advocate for refugees, died yesterday at 64 on the Feast of the Assumption.

In his honor, we may perhaps be justified in temporarily ignoring the wise saying "never assume."

From a defense of the dogma of the Assumption:

"On another level, the Assumption epitomizes the reconciliation of the material and spiritual world, as the human Mary enters 'body and soul to heavenly glory.' Carl Jung, the transpersonal psychologist, concluded that the doctrine of the Assumption reflected an acceptance of the physical world."

For other such reconciliations, see

  • The New Yorker on Milton meeting Galileo: "Though Milton was the much younger man, in some ways his world system seems curiously older than the astronomer’s empirical universe."
  • This journal on Milton's world system: the four qualities "hot, cold, moist, and dry" and the four elements "Sea, Shore, Air, and Fire."

    But all these in thir pregnant causes mixt
    Confus'dly, and which thus must ever fight,
    Unless th' Almighty Maker them ordain
    His dark materials to create more Worlds….

  • This journal's "For Galois on Bastille Day" reconciles, if only in a literary way, physical and non-physical worlds. The work of Evariste Galois allows us to depict an analogue of Milton's (and Philip Pullman's) physical world of dark materials within the purely mathematical world of finite groups. (For a less literary connection between physical and mathematical worlds, see this journal on Bastille Eve.)

Saturday, August 15, 2009

Saturday August 15, 2009

Filed under: General,Geometry — m759 @ 1:00 pm

For St. Willard
Van Orman Quine

                          " ... to apprehend
The point of intersection of the timeless
With time, is an occupation for the saint"
-- Four Quartets

http://www.log24.com/log/pix09A/090815-QuineKyoto.gif

Quine receives
Kyoto Prize

The Timeless:

http://www.log24.com/log/pix09A/090815-Grid8x8.gif


Time

(64 years,
and more):

Today in History

Today is Saturday, Aug. 15, the 227th day of 2009. There are 138 days left in the year.

Today’s Highlight in History:

On Aug. 15, 1945, Japanese Emperor Hirohito announced to his subjects in a prerecorded radio address that Japan had accepted terms of surrender for ending World War II.

On this date:

In 1057, Macbeth, King of Scots, was killed in battle by Malcolm, the eldest son of King Duncan, whom Macbeth had slain.


Macbeth:

"Life's but a walking shadow, a poor player
 That struts and frets his hour upon the stage
And then is heard no more: it is a tale
Told by an idiot, full of sound and fury,
Signifying nothing."

Quine:

“I really have nothing to add.”
— Quine, quoted
on this date in 1998.

Wednesday, August 12, 2009

Wednesday August 12, 2009

Filed under: General,Geometry — m759 @ 12:00 pm
Exegesis

Text:

The Shining,
1977, page 162:

“A new headline, this one
 dated April 10….”

“The item on the next page
 was a mere squib, dated
 four months later….”

Exegesis:

April 10— Good Friday– See
The Paradise of Childhood.

Four months later– Aug. 10

“When he thought of the old man
  he could see him suddenly
  in a field in the spring,
  trying to move a gray boulder.”

Thursday, August 6, 2009

Thursday August 6, 2009

Filed under: General,Geometry — Tags: , , — m759 @ 1:44 pm
A Fisher of Men
 
 
Cover, Schulberg's novelization of 'Waterfront,' Bantam paperback
Update: The above image was added
at about 11 AM ET Aug. 8, 2009.

 
Dove logo, First United Methodist Church of Bloomington, Indiana

From a webpage of the First United Methodist Church of Bloomington, Indiana–

 

Dr. Joe Emerson, April 24, 2005–

"The Ultimate Test"

— Text: I Peter 2:1-9

Dr. Emerson falsely claims that the film "On the Waterfront" was based on a book by the late Budd Schulberg (who died yesterday). (Instead, the film's screenplay, written by Schulberg– similar to an earlier screenplay by Arthur Miller, "The Hook"–  was based on a series of newspaper articles by Malcolm Johnson.)

"The movie 'On the Waterfront' is once more in rerun. (That’s when Marlon Brando looked like Marlon Brando.  That’s the scary part of growing old when you see what he looked like then and when he grew old.)  It is based on a book by Budd Schulberg."

 

Emerson goes on to discuss the book, Waterfront, that Schulberg wrote based on his screenplay–

"In it, you may remember a scene where Runty Nolan, a little guy, runs afoul of the mob and is brutally killed and tossed into the North River.  A priest is called to give last rites after they drag him out."

 

Hook on cover of Budd Schulberg's novel 'Waterfront' (NY Times obituary, detail)

New York Times today

Dr. Emerson flunks the test.

 

Dr. Emerson's sermon is, as noted above (Text: I Peter 2:1-9), not mainly about waterfronts, but rather about the "living stones" metaphor of the Big Fisherman.

My own remarks on the date of Dr. Emerson's sermon

The 4x6 array used in the Miracle Octad Generator of R. T. Curtis

Those who like to mix mathematics with religion may regard the above 4×6 array as a context for the "living stones" metaphor. See, too, the five entries in this journal ending at 12:25 AM ET on November 12 (Grace Kelly's birthday), 2006, and today's previous entry.

Wednesday, August 5, 2009

Wednesday August 5, 2009

Filed under: General,Geometry — Tags: , — m759 @ 11:30 am

 

Word and Image

NYT obituary summaries for Charles Gwathmey and Edward Hall, morning of Aug. 5, 2009

From Hall's obituary
:

"Edward T. Hall, a cultural anthropologist
who pioneered the study of nonverbal
 communication and interactions between
members of different ethnic groups,
 died July 20 at his home in
 Santa Fe, N.M. He was 95."

NY Times piece quoted here on
 the date of Hall's death:
 

"July 20, 1969, was the moment NASA needed, more than anything else in this world, the Word. But that was something NASA's engineers had no specifications for. At this moment, that remains the only solution to recovering NASA's true destiny, which is, of course, to build that bridge to the stars."

— Tom Wolfe, author of The Right Stuff, an account of the Mercury Seven astronauts.

Commentary
The Word according to St. John:

Jill St. John, star of 'Diamonds are Forever'

 

From Hall's obituary:

"Mr. Hall first became interested in
space and time as forms of cultural
 expression while working on
Navajo and Hopi reservations
 in the 1930s."

Log24, July 29
:

Changing Woman:

"Kaleidoscope turning…

Juliette Binoche in 'Blue'  The 24 2x2 Cullinane Kaleidoscope animated images

Shifting pattern within   
unalterable structure…"
— Roger Zelazny,  
Eye of Cat  

"We are the key."
Eye of Cat  

Update of about 4:45 PM 8/5:

Paul Newall, "Kieślowski's Three Colours Trilogy"

"Julie recognises the music of the busker outside playing a recorder as that of her husband's. When she asks him where he heard it, he replies that he makes up all sorts of things. This is an instance of a theory of Kieślowski's that 'different people, in different places, are thinking the same thing but for different reasons.' With regard to music in particular, he held what might be characterised as a Platonic view according to which notes pre-exist and are picked out and assembled by people. That these can accord with one another is a sign of what connects people, or so he believed."

The above photo of Juliette Binoche in Blue accompanying the quotations from Zelazny illustrates Kieślowski's concept, with graphic designs instead of musical notes. Some of the same designs are discussed in Abstraction and the Holocaust (Mark Godfrey, Yale University Press, 2007). (See the Log24 entries of June 11, 2009.)

Related material:

"Jeffrey Overstreet, in his book Through a Screen Darkly, comments extensively on Blue. He says these stones 'are like strands of suspended crystalline tears, pieces of sharp-edged grief that Julie has not been able to express.'….

Throughout the film the color blue crops up, highlighting the mood of Julie's grief. A blue light occurs frequently, when Julie is caught by some fleeting memory. Accompanied by strains of an orchestral composition, possibly her husband's, these blue screen shots hold for several seconds while Julie is clearly processing something. The meaning of this blue light is unexplained. For Overstreet, it is the spirit of reunification of broken things."

Martin Baggs at Mosaic Movie Connect Group on Sunday, March 15, 2009. (Cf. Log24 on that date.)

For such a spirit, compare Binoche's blue mobile in Blue with Binoche's gathered shards in Bee Season.

Tuesday, August 4, 2009

Tuesday August 4, 2009

Filed under: General,Geometry — m759 @ 12:25 pm
High Noon

Images from Log24 on
December 10, 2006
Nobel Prize Day, and
the day after
  Kirk Douglas’s birthday

Kirk Douglas promoting his film 'Diamonds'

Kirk Douglas ad for
the film “Diamonds”
(2000)

Motto of Plato's Academy: 'Let no one ignorant of geometry enter'

The 3x3 grid

Images from
Google News
   at noon today —

(Click for details.)

3x3 array of Cameron Douglas images from Google News, August 4, 2009

“The serpent’s eyes shine
    as he wraps around the vine…”

Don Henley on a California hotel

Tuesday August 4, 2009

Filed under: General,Geometry — Tags: — m759 @ 8:00 am

Just What We Need

Thomas Pynchon's new novel
Inherent Vice comes out today.

Title of a review in
The New York Times:
Another Doorway to the
Paranoid Pynchon Dimension

More interesting doorways:

Doorway to 'The Aleph Sanctuary,' by Mati Klarwein

An Aleph for Pynchon (July 9)

Click on the doorway for details.

Rabbi Ephraim Oshry
Rabbi

Abstract Aleph
Aleph

The Aleph (July 8)

Click on the aleph for details.

Saturday, August 1, 2009

Saturday August 1, 2009

Filed under: General,Geometry — Tags: — m759 @ 9:26 am
And the Tony
   goes to…

The New York Times today:

"Tony Rosenthal, who created 'Alamo,' the eternally popular revolving black cube in Astor Place in the East Village, and many other public sculptures, died on Tuesday [July 28, 2009] in Southampton, N.Y. He was 94."

The Astor Place sculpture, near Cooper Union, is also known as The Borg Cube:

http://www.log24.com/log/pix09A/090801-CooperCube2.jpg

The Borg Cube, with
Cooper Union at left

Wikipedia on The Borg Queen:

"The Borg Queen is the focal point within the Borg collective consciousness."

Possible Borg-Queen candidates:

Helen Mirren, who appeared in this journal on the date of Rosenthal's death (see Monumental Anniversary), and Julie Taymor, who recently directed Mirren as Prospera in a feminist version of "The Tempest."

Both Mirren and Taymor would appreciate the work of Anita Borg, who pioneered the role of women in computer science. "Her colleagues mourned Borg's passing, even as they stressed how crucial she was in creating a kind of collective consciousness for women working in the heavily male-dominated field of computer technology." —Salon.com obituary

http://www.log24.com/log/pix09A/090801-AnitaBorgSm.jpg

Anita Borg

Borg died on Sunday, April 6, 2003. See The New York Times Magazine for that date in Art Wars: Geometry as Conceptual Art

http://www.log24.com/log/pix09A/090801-NYT_Magazine030406.jpg
(Cover typography revised)

I would award the Borg-Queen Tony to Taymor, who seems to have a firmer grasp of technology than Mirren.

Julie Taymor directing a film

See Language Game,
Wittgenstein's birthday, 2009.

Wednesday, July 29, 2009

Wednesday July 29, 2009

Filed under: General,Geometry — m759 @ 12:21 pm
Kaleideion

Adam and God (Sistine Chapel), with Jungian Self-Symbol and Ojo de Dios (The Diamond Puzzle)

Related material:

“A great deal has been made of the fact that Forbidden Planet is essentially William Shakespeare’s The Tempest (1611) in an science-fiction setting. It is this that transforms Forbidden Planet into far more than a mere pulp science-fiction story” — Richard Scheib

Dialogue from Forbidden Planet


“… Which makes it a gilt-edged priority that one of us gets into that Krell lab and takes that brain boost.”

Dialogue from another story —

“They thought they were doing a linear magnification, sort of putting me through a  magnifying glass.”

“Sizewise?”

“Brainwise, but what they did was multiply me by myself into a quadratic.”

Psychoshop, by Bester and Zelazny, 1998 paperback, p. 7

“… which would produce a special being– by means of that ‘cloned quadratic crap.’ [P. 75] The proper term sounds something like ‘Kaleideion‘….”

“So Adam is a Kaleideion?”

She shook her head.

“Not a Kaleideion. The Kaleideion….”

Psychoshop, 1998 paperback, p. 85


See also

Changing Woman:

“Kaleidoscope turning…

Juliette Binoche in 'Blue'  The 24 2x2 Cullinane Kaleidoscope animated images

Shifting pattern within   
unalterable structure…”
— Roger Zelazny, Eye of Cat  

“When life itself seems lunatic,
who knows where madness lies?”

— For the source, see 
Joyce’s Nightmare Continues.

Tuesday, July 28, 2009

Tuesday July 28, 2009

Filed under: General,Geometry — m759 @ 1:06 pm
Man and
His Symbols 101

Continued from July 21

A headline from yesterday:

US-China ties will shape
21st century: Obama

A headline from 2003,
with an epiphany from
twenty years ago:

The Tables of Time

JFK and chess at Chinatown picnic table

Peace Rune
Hexagram 11,
Jan. 6, 1989

Picnic Symbol 

Picnic site symbol,
British Sea Scouts

In related news:

Obama to hold picnic-table peace talk

Monday, July 27, 2009

Monday July 27, 2009

Filed under: General,Geometry — Tags: , — m759 @ 2:29 pm
Field Dance

The New York Times
on June 17, 2007:

 Design Meets Dance,
and Rules Are Broken

Yesterday's evening entry was
on the fictional sins of a fictional
mathematician and also (via a link
to St. Augustine's Day, 2006), on
the geometry of the I Ching* —

The eternal
combined with
the temporal:

Circular arrangement of I Ching hexagrams based on Singer 63-cycle in the Galois field GF(64)

The fictional mathematician's
name, noted here (with the Augustine-
I Ching link as a gloss) in yesterday's
evening entry, was Summerfield.

From the above Times article–
"Summerspace," a work by
 choreographer Merce Cunningham
and artist Robert Rauschenberg
that offers a competing
 vision of summer:

Summerspace — Set by Rauschenberg, choreography by Cunningham

Cunningham died last night.

John Cage, Merce Cunningham, Robert Rauschenberg in the 1960's

From left, composer John Cage,
choreographer Merce Cunningham,
and artist Robert Rauschenberg
in the 1960's

"When shall we three meet again?"

* Update of ca. 5:30 PM 7/27– today's online New York Times (with added links)– "The I Ching is the 'Book of Changes,' and Mr. Cunningham's choreography became an expression of the nature of change itself. He presented successive images without narrative sequence or psychological causation, and the audience was allowed to watch dance as one might watch successive events in a landscape or on a street corner."

Sunday, July 26, 2009

Sunday July 26, 2009

Filed under: General,Geometry — Tags: , — m759 @ 8:28 pm

Happy Birthday,
Inspector Tennison

'Prime Suspect'-- Helen Mirren as Inspector Tennison
(See entries of
November 13, 2006)

Library Thing book list: 'An Awkward Lie' and 'A Piece of Justice'

Related material
for Prospera:

  1. Jung's Collected Works
  2. St. Augustine's Day, 2006
    (as a gloss on the name
    "Summerfield" in
    A Piece of Justice and on
    Inspector Tennison's age today)
  3. Quilt Geometry

Thursday, July 23, 2009

Thursday July 23, 2009

Filed under: General,Geometry — Tags: , — m759 @ 5:01 am

A Tangled Tale

Proposed task for a quantum computer:

"Using Twistor Theory to determine the plotline of Bob Dylan's 'Tangled up in Blue'"

One approach to a solution:

"In this scheme the structure of spacetime is intrinsically quantum mechanical…. We shall demonstrate that the breaking of symmetry in a QST [quantum space-time] is intimately linked to the notion of quantum entanglement."

— "Theory of Quantum Space-Time," by Dorje C. Brody and Lane P. Hughston, Royal Society of London Proceedings Series A, Vol. 461, Issue 2061, August 2005, pp. 2679-2699

(See also The Klein Correspondence, Penrose Space-Time, and a Finite Model.)

For some less technical examples of broken symmetries, see yesterday's entry, "Alphabet vs. Goddess."

That entry displays a painting in 16 parts by Kimberly Brooks (daughter of Leonard Shlain– author of The Alphabet Versus the Goddess— and wife of comedian Albert Brooks (real name: Albert Einstein)). Kimberly Brooks is shown below with another of her paintings, titled "Blue."

http://www.log24.com/log/pix09A/090722-ArtisticVision-Sm.jpg

Click image to enlarge.

"She was workin' in a topless place
 And I stopped in for a beer,
 I just kept lookin' at the side of her face
 In the spotlight so clear.
 And later on as the crowd thinned out
 I's just about to do the same,
 She was standing there in back of my chair
 Said to me, 'Don't I know your name?'
 I muttered somethin' underneath my breath,
 She studied the lines on my face.
 I must admit I felt a little uneasy
 When she bent down to tie the laces of my shoe,
 Tangled up in blue."

-- Bob Dylan

Further entanglement with blue:

The website of the Los Angeles Police Department, designed by Kimberly Brooks's firm, Lightray Productions.

Further entanglement with shoelaces:

"Entanglement can be transmitted through chains of cause and effect– and if you speak, and another hears, that too is cause and effect.  When you say 'My shoelaces are untied' over a cellphone, you're sharing your entanglement with your shoelaces with a friend."

— "What is Evidence?," by Eliezer Yudkowsky

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