This square becoming the smallest known add-mult magic
square, smaller than the previous records (W. Horner's
8x8 and C. Boyer's 8x8), updated table of
known
add-mult squares
#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.
Perfect bimagic cubes of orders 16
and 25 constructed by Zhong Ming; they are the new smallest known
perfect bimagic cubes, smaller than my perfect bimagic cube of
order 32
And also...
Second edition of "Latin
Squares and their Applications"
now available (Elsevier 2015). This famous book by Donald Keedwell
and Jószef
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!
Good news on Frost's cube
of 11, and new photo by John Williamson, added in Frost's biography. This cube
has now been conserved and is in excellent condition in the Holloway College
archives.
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.
Who has any news of Lee Morgenstern?
(see below, news of Feb. 24)
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 longer 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
2006, send
me a message!
< Morgenstern's old webpages at earthlink.net
(click to enlarge)
Added February 24, 2017
I succeeded in contacting
Lee Morgenstern, and good news, he is well! Because his webpages
are no longer available, his interesting counting method was "lost",
with a dead link from my page on multimagic series. He kindly sent
me a PDF: bimagic series counting method, by Morgenstern
in 2013, now again available.