Also on January 16, 2014 —
Tuesday, March 14, 2023
Disney Endings
The New York Times reports a Monday,
March 13, 2023, death:
This journal Monday —
Final image of the above "diamond theorem" penrose search on Monday —
From March 2 —
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Monday, February 21, 2022
Variation on an Old Joke
An image linked to* in Mapping Problem Continued (Log24, 16 July 2012) —
* The link is on the phrase "may be deduced."
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Sunday, July 19, 2020
Sunday, January 19, 2014
Deep Beauty
Old punchline: “Spell chrysanthemum.”
Variation: “Spell coordinatization.”
Related test: Chrysanthemum Coordinatization —
Context: Root circle.
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Saturday, January 18, 2014
The Triangle Relativity Problem
A sequel to last night's post The 4×4 Relativity Problem —
In other words, how should the triangle corresponding to
the above square be coordinatized ?
See also a post of July 8, 2012 — "Not Quite Obvious."
Context — "Triangles Are Square," a webpage stemming
from an American Mathematical Monthly item published
in 1984.
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Friday, January 17, 2014
The 4×4 Relativity Problem
The sixteen-dot square array in yesterday’s noon post suggests
the following remarks.
“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, The Classical Groups ,
Princeton University Press, 1946, p. 16
The Galois tesseract appeared in an early form in the journal
Computer Graphics and Art , Vol. 2, No. 1, February 1977—
The 1977 matrix Q is echoed in the following from 2002—
A different representation of Cullinane’s 1977 square model of the
16-point affine geometry over the two-element Galois field GF(2)
is supplied by Conway and Sloane in Sphere Packings, Lattices and Groups
(first published in 1988) :
Here a, b, c, d are basis vectors in the vector 4-space over GF(2).
(For a 1979 version of this vector space, see AMS Abstract 79T-A37.)
See also a 2011 publication of the Mathematical Association of America —
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Thursday, January 16, 2014
Confession of a Sucker
Today’s 11 AM (ET) post was suggested by a New York Times
article, online yesterday, about art gallery owner Lisa Cooley.
A check of Cooley’s website yields the image below,
related to Beckett’s Molloy .
For the relevant passage from Molloy , click the following:
“I took advantage of being at the seaside
to lay in a store of sucking-stones.“
For posts on Molloy in this journal, click Beckett + Molloy .
Cynthia Daignault, 2011:
The one I shall now describe, if I can…
Oil on linen, in 2 parts: 40 x 30 inches, 96 x 75 inches
Related art theory —
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