#1 (3x3 magic square of squares, or using at least 7 distinct squared
integers), new searches
from Terry Moriarty, Eddie
Guttierez, Matt Parker (with Brady Haran), Ben Asselstine. Fun
video with Matt Parker trying to solve the enigma #1.
Second edition of "Latin
Squares and their Applications"
now available (Elsevier 2015). This famous book by Donald Keedwell
Dénes, foreword by Paul Erdös, first published in 1974, is revised and gives
the present state of knowledge on Latin squares. Many thanks to Donald
Keedwell for several references to my work and to this website!
Updated biography of Georges Pfeffermann (in
French, but summary in English) on
his last years in Issoire, thanks to Gildas Guillemot who had the idea
to search in the archives of Le Moniteur d'Issoire.
This retired mathematician living
in Los Angeles, California, can no more be reached through his email
address at earthlink.net ("550 User account is unavailable").
My last exchange of messages with him was in May 2015.
His webpages http://home.earthlink.net/~morgenstern
are no more available ("403 Forbidden") since
at least January 2016, and were unfortunately not fully
saved by the Wayback Machine. If you have any info on
this author of numerous results reported in multimagie.com since
me a message!
< Morgenstern's old webpages at earthlink.net
(click to enlarge)