[math-fun] crossword puzzle clue, 29 Dec 2006 New York Times

52 Across: Pioneer in the math of Sudoku (5 letter answer) I won't spoil it by giving the answer, which you can have by clicking this URL http://tinyurl.com/yqvedr My question is this: is there something interesting that Mr. X had to do with the "math of Sudoku"? I'm aware of general things, but is there something specific that comes to mind? -- Thane Plambeck tplambeck@gmail.com http://www.plambeck.org/ehome.htm