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David Breyer Singmaster (born 1939, USA〔(Hot-Selling Hungarian Horror - TIME )〕) is a retired professor of mathematics at London South Bank University, England, UK. A self-described metagrobologist, he is most famous for his cube notation (i.e., which letters denote which faces on the Rubik's Cube), his solution to the Rubik's Cube〔〔 and his huge personal collection of mechanical puzzles and books of brain teasers. He is also interested in the history of computers. In combinatorial number theory, Singmaster's conjecture states that there is a finite upper bound on the number of times a number other than 1 can appear in Pascal's triangle. Paul Erdős suspected that the conjecture is true, but thought it would probably be very difficult to prove. The empirical evidence is consistent with the proposition that the smallest upper bound is 8. ==Books== * ''(Notes on Rubik's magic cube )'', David Singmaster. Enslow Pub Inc, 1981. ISBN 0-89490-043-9. * ''(Handbook of Cubik Math )'', David Singmaster and Alexander Frey. The Lutterworth Press, 1987. ISBN 0-7188-2555-1. * ''(Rubik's Cube Compendium )'',Edited by David Singmaster Oxford University Press, 21 April 1988. ISBN 0-19-853202-4. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「David Singmaster」の詳細全文を読む スポンサード リンク
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