tag:blogger.com,1999:blog-36269973.post2121755798518390908..comments2023-12-15T10:06:21.344-05:00Comments on The Mathematical Tourist: Beautiful Mathematics and Imaginative WordsMath Touristhttp://www.blogger.com/profile/00014397210725962876noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-36269973.post-7973772514583454232013-06-07T11:38:55.207-05:002013-06-07T11:38:55.207-05:00In "Beautiful Mathematics," pages 106-10...In "Beautiful Mathematics," pages 106-108, section 5.17, "A Group of Operations," Martin Erickson does not acknowledge any source.<br /><br />That section, on a group of 322,560 permutations generated by permuting the rows, columns, and quadrants of a 4x4 array, is based on the Cullinane diamond theorem. See that theorem (published in an AMS abstract in 1979) at PlanetMath.orgSteven H. Cullinanenoreply@blogger.comtag:blogger.com,1999:blog-36269973.post-6947301649268201142013-06-07T11:34:01.322-05:002013-06-07T11:34:01.322-05:00In "Beautiful Mathematics," pages 106-10...In "Beautiful Mathematics," pages 106-108, section 5.17, "A Group of Operations," Martin Erickson does not acknowledge any source.<br /><br />That section, on a group of 322,560 permutations generated by permuting the rows, columns, and quadrants of a 4x4 array, is based on the Cullinane diamond theorem. See that theorem (published in an AMS abstract in 1979) at PlanetMath.orgSteven H. Cullinanenoreply@blogger.com