Category: Geometry Page 12 of 168
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…
(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,…
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…
(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 image search (2.26 MB).
Barron’s Educational Series (click to enlarge): The Tablet of Ahkmenrah: “With the Tablet of Ahkmenrah and the Cube of Rubik, my power will know no bounds!” — Kahmunrah…
The title is from a Log24 post, "Diabolically Complex Riddle," of Sept. 27, 2014. (See also a search for "Diabolic" in this journal, which yields an application to…
My own contribution to an event of the Mathematical Association of America: Rick’s Tricky Six and The Judas Seat. The Polster tetrahedral model of a finite geometry appears, notably,…
Parallelograms and the structure of the 3×3 array — Click to enlarge: A different approach to parallelograms and arrays — Click for original post:
(Continued from Nov. 16, 2013.) The 48 actions of GL(2,3) on a 3×3 array include the 8-element quaternion group as a subgroup. This was illustrated in a Log24 post,…