Log24

Friday, May 4, 2018

Entropy

Filed under: General,Geometry — m759 @ 2:00 pm

A more serious note in memory of Anatole Katok:

"Entropy measures the unpredictability
of a system that evolves over time."

Alex Wright, BULLETIN (New Series)
OF THE AMERICAN MATHEMATICAL SOCIETY

Volume 53, Number 1, January 2016, Pages 41–56

http://dx.doi.org/10.1090/bull/1513

Article electronically published on September 8, 2015:

FROM RATIONAL BILLIARDS
TO DYNAMICS ON MODULI SPACES

Abstract:

"This short expository note gives an elementary
introduction to the study of dynamics on certain
moduli spaces and, in particular, the recent 
breakthrough result of Eskin, Mirzakhani,
and Mohammadi. We also discuss the context
and applications of this result, and its connections
to other areas of mathematics, such as algebraic
geometry, Teichmüller theory, and ergodic theory
on homogeneous spaces."

See also the lives of Ratner and Mirzakhani.

Sunday, July 21, 2024

For Jack and Jill:
Vinegar and Brown Acid

Filed under: General — m759 @ 5:36 am

Vinegar and Brown Acid.

Click to enlarge

Midrash adapted from T. S. Eliot —

"In his end is his beginning."

Thursday, May 3, 2018

A Walpurgisnacht Death for Dan Brown

Filed under: General — m759 @ 11:30 pm

In memory of Anatole Katok, who reportedly died on Walpurgisnacht,
two readings from a source cited by Dan Brown in his recent novel
Origin

Brown is reportedly a graduate of Phillips Exeter Academy and
of Amherst College.

Those associated with institutions that are more respectable
may prefer Katok on entropy.

Saturday, January 20, 2018

The Chaos Symbol of Dan Brown

Filed under: General,Geometry — Tags: — m759 @ 1:30 am

In the following passage, Dan Brown claims that an eight-ray star
with arrowheads at the rays’ ends is “the mathematical symbol for
entropy.”  Brown may have first encountered this symbol at a
questionable “Sacred Science” website.  Wikipedia discusses
some even less  respectable uses of the symbol.

Related news —

Related symbolism —

http://www.log24.com/log/pix11/110219-SquareRootQuaternion.jpg

A star figure and the Galois quaternion.

The square root of the former is the latter.

Monday, October 23, 2017

Plan 9 Continues

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

Click for some background

Another approach, for Dan Brown fans —

In the following passage, Brown claims that an eight-ray star
with arrowheads at the rays' ends is "the mathematical symbol for
entropy."  Brown may have first encountered this symbol at a 
questionable "Sacred Science" website.  Wikipedia discusses
some even less  respectable uses of the symbol.

Friday, October 13, 2017

Sicut Erat

Filed under: General — Tags: — m759 @ 9:26 pm

Smith College in 2011 on some music by Dan Brown's brother —

"Using the conventions of a traditional five-movement
Roman Catholic Mass to revere Darwin’s body of work,
Gregory Brown, Smith’s assistant director of choral
activities and a composer of choral music, is
collaborating with Craig Phillips, an early music specialist
and member of the classical a cappella male quartet
New York Polyphony, to create the piece Missa Charles Darwin . 
Brown is building the work in three large-scale sections and
scoring it for a male vocal quartet, which will be performed by
New York Polyphony."

https://www.smith.edu/insight/stories/darwin.php

Dan Brown has said his brother's Missa  helped suggest his new novel Origin .

Material from Smith College related to a performance of
Missa Charles Darwin  at the college on Feb. 4, 2011 —

Dan Brown, in the following passage, claims that an eight-ray star with arrowheads
at the rays' ends is "the mathematical symbol for entropy."  Brown may have first
encountered this symbol at a questionable "Sacred Science" website.  Wikipedia
discusses some even less  respectable uses of the symbol.

My own version of the above symbol (from the pure mathematics of group actions
on a 3×3 square) appeared here the day before  the Friday, Feb. 4, 2011,
Smith College Darwin Mass . . .

See posts now tagged The Next Thing.

Thursday, October 11, 2007

Thursday October 11, 2007

Filed under: General — m759 @ 5:01 pm

Comments today on Peter Woit’s weblog entry “Deep Beauty“–

  1. chris says:

    once we reach the point at which the templeton foundation – or any other private sponsor for that matter – is the main source of funding in a certain area of science it would be time for society to react. react by outdoing the private source and thus claiming the research topic in question firmly back into the public domain.

    if society chooses to be oblivious – well – then so be it. research in that area will then not be driven by public interest but by private interest. ultimately it is just a reflection of the value commonly assigned to a specific field.

    what i hope this will ultimately achieve is to ring the alarm bell in society that no private organization should take over research funding and direction.

    if this will not happen – well – then we are kind of lost anyways. and funding no matter what agenda behind is still better than no funding, since i firmly believe that ultimately the truth (i.e. true statements about reproducible empirical relations) will ultimately prevail and nothing else.

  2. Steven H. Cullinane says:

    Chris says the truth consists of “true statements about reproducible empirical relations.” He should read William Golding’s Nobel lecture: “When I consider a universe which the scientist constructs by a set of rules which stipulate that this construct must be repeatable and identical, then I am a pessimist and bow down before the great god Entropy. I am optimistic when I consider the spiritual dimension which the scientist’s discipline forces him to ignore.”

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