Log24

Monday, July 6, 2026

Pieces of Eight: The Klein Quadric in PG(5,2)

Filed under: General — Tags: , — m759 @ 7:24 pm

A challenge today for NotebookLM video creation . . .

"Explain how the four-color decomposition theorem works,
applying it to both the 4×4 arrays of the diamond theorem proof
and to the 4-row 2-column arrays that illustrate the 105 lines of
the Klein quadric in PG(5,2).  Then explain how the four-color
decomposition theorem illustrates the way that the thirty 7-point
planes of PG(5,2) [Error in the prompt: Should have been 'of the
Klein quadric']
 correspond to the fifteen points and the fifteen
7-point hyperplanes of PG(3,2)."

"Generating Cinematic Video Overview . . .
This may take a while." — 7:21 pm ET

Update the same day —

Completed at 7:42 pm —a 4 min., 56 sec. video — provocatively
titled by the NotebookLM AI "The Geometry of the Monster."

The AI-supplied title does not refer to the sporadic group known
to mathematicians as "the Monster," but instead (and wrongly)
to its much smaller subgroup, the Mathieu group M24.  Understanding
the geometry of M24 may, however, help somewhat in understanding 
the real  Monster group.  (Vide Griess, Twelve Sporadic Groups.)

The video is on YouTube at . . .

https://www.youtube.com/watch?v=p_ZtazR8VDs .

260706-AI-named-'Geometry_of_the_Monster'-YouTube-video.jpg

Friday, July 3, 2026

“Pieces of Eight”

Filed under: General — Tags: , , , — m759 @ 12:14 pm

The above title is from a paper by R. L. Griess* —

The title also applies to . . .

Partitions of an 8-set into four 2-sets that
correspond to lines  in projective geometry . . .

 *

Thursday, July 2, 2026

Coordinatization

Filed under: General — Tags: — m759 @ 3:26 pm

Putting Descartes Before Dehors

      

"Descartes déclare que c'est en moi, non hors de moi,
en moi, non dans le monde, que je pourrais voir
si quelque chose existe hors de moi."

ATRIUM, Philosophie

Tuesday, September 8, 2020

“The Eight” according to Coleridge

Filed under: General — Tags: , , — m759 @ 10:32 pm

Metaphysical ruminations of Coleridge that might be applied to
the eightfold cube

See also "Sprechen Sie Neutsch?".
 

Update of December 29, 2022 —

 

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