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Foundation Square

In the above illustration of the 3-4-5 Pythagorean triangle, the grids on each side may be regarded as figures of Euclidean  geometry or of Galois  geometry. In Euclidean geometry, these grids…

New Key

See Langer (Harvard U. Press, Third Edition, Jan. 31, 1957, pp. 3-4-5). See also Old Key : Pythagoras, harmony, and the 3-4-5 triangle.

Prime Cut

See that phrase in this journal.

The Seventh Stage

Robin Williams and the Stages of Math i)   shock & denial ii)  anger iii) bargaining iv) depression v)  acceptance And then… vi)  checking vii) Joan Rivers See also…

Claves Regni Caelorum

Continued from Day at the Museum, last Sunday, October 19, 2014. This post was suggested by…  A piece in the Bookends section of the New York Times Sunday Book Review …

Eerie Twist

(Continued from Nov. 15, 2011) Ben Bradlee, legendary Washington Post editor, dies at 93 See also a post of Jan. 20, 2011, and an earlier post on Twelfth Night,…

Art as a Tool

Two news items on art as a tool: Two Log24 posts related to the 3×3 grid, the underlying structure for China’s ancient Lo Shu “magic” square: Finally, leftist…

Tools

(Night at the Museum continues.) "Strategies for making or acquiring tools While the creation of new tools marked the route to developing the social sciences, the question remained:…

The Library

The online Harvard Crimson  today: “ ‘I don’t like how they check your bags when you leave the library even though you have to swipe your student ID…

The Writing Desk

Why is  a raven like a writing desk?