...but the bottle of champagne 
is always
in my cellar (and the 100€ 
always in my wallet): who will solve the Open problem 2?News linked to the M.I. article:
- New table clearly summarizing the status, known or unknown, of the magic squares of squares and bimagic squares problems, with Open problems 1 to 3.
- Two new pages, detailing the above new table:
- New page presenting the first known magic squares of squares, including the discovery of the first known 6x6 and 7x7 (not known at the time of the M.I. article). Because 4x4 and 5x5 magic squares of squares were previously known, 3x3 is now the ONLY unknown order of magic squares of squares... Very difficult Open problem 1...
- ??!!?? New page on ONE OF THE MOST INTRIGUING multimagic questions: is it possible to construct a bimagic square smaller than 8x8 and using distinct integers? It is the Open problem 3 of the M.I. article (see also the table). The best known 5x5, 6x6 and 7x7 squares, very near to the solution, are presented.
- Explanations added to Open problem 10 which was unclear out of the M.I. article: "Demonstrate the general case of a magic (2k+1)k+1"
- MathTrek article (in
and
) summarizing
the M.I. article and presenting the very new 6x6 and 7x7 magic
squares of squares. Thanks to Ivars Peterson, USA - Photo taken during my lecture on magic squares of squares. Thanks to Marc Lecoester, president of the URISP, France, for this photo
On the COVER of the 7th edition of the book Mathematics for
Elementary Teachers, very nice illustration
using our perfect magic
cube of order 5 constructed in 2003. Thanks to the authors Gary L. Musser and Blake E. Anderson,
USA, for this great honour!- web site of Chen Qinwu, China
- web site of Ed Pegg Jr., USA
- web site of Francis Gaspalou, France
- web site of Mitsutoshi Nakamura, Japan