David Singmaster

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David Singmaster
David Singmaster 2006.jpg
March 2006
Born 1939 (age 76–77)
United States
Occupation Retired professor of mathematics
Known for Mathematics of puzzles

David Breyer Singmaster (born 1939, USA[1]) 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[2][3] 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.


See also[edit]


  1. ^ Hot-Selling Hungarian Horror - TIME
  2. ^ David Singmaster (1980-08-06). "A Step by Step Solution of Rubik's "Magic Cube"". Jeffrey W Baumann & LinkedResources. Archived from the original on 2006-03-04. 
  3. ^ Ryan Heise. "Beginner's Rubik's Cube Solution". Archived from the original on 2015-09-26. The general layer-by-layer approach described above is credited to mathematician David Singmaster and was first published in his 1980 book "Notes on Rubik's Magic Cube" 
  4. ^ https://www.amazon.co.uk/Problems-Metagrobologists-Collection-Mathematical-Mathematics/dp/9814663638

External links[edit]