That day in 1957 was the third day after I turned 15.
I had finished 9th grade earlier that year. A check of my
hometown's (Warren, Pennsylvania) newspaper of Aug. 26,
1957, yields news of my former teacher from sixth grade . . .

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Perhaps in the afterlife he can see himself portrayed by Robert Redford.

Publication date from the end of page 217 —

See as well today's previous post, "By Time Possessed."

http://m759.net/wordpress/?tag=three-days

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This was suggested by the following art —

Credits:

Mia Pensa, Steven H. Cullinane,
and the Brooklyn Bridge.

— Photo caption in The New York Times  today 

Related reading . . .

"Articulate the lessons of the past."

https://notebook.google.com/notebook/
62ad8daa-277e-4fea-a680-9b209883f232

108 Sources . . . August 25, 2026

These sources explore the Cullinane diamond theorem and its profound connections between finite projective geometry, group theory, and visual symmetry. At its core, the theorem demonstrates that permuting a 4×4 array of diagonally divided tiles according to specific affine groups preserves internal symmetry or color-interchange properties. This combinatorial framework provides a visual model for PG(3,2), mapping 35 unique square patterns to the 35 lines of a three-dimensional projective space. The research further links these geometric structures to the Miracle Octad Generator, the Mathieu group M24, and the Leech lattice, bridging abstract sporadic groups with tangible graphic designs. Additionally, the texts detail how Conwell’s heptads and the Klein correspondence establish an isomorphism between partitions of an 8-set and the geometry of the Klein quadric. Beyond pure mathematics, the work extends into Boolean logic, Walsh functions, and the aesthetic philosophy of symmetric patterns found in art and quilts.

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