Richard K. Guy

British mathematician

Richard Kenneth Guy (30 September 1916 – 9 March 2020) was a British-Canadian mathematician. He was professor emeritus in the Department of Mathematics at the University of Calgary.[1]

Richard K. Guy
Richard K Guy 2005.jpg
Richard Kenneth Guy

(1916-09-30)30 September 1916
Died9 March 2020(2020-03-09) (aged 103)
Calgary, Alberta, Canada
Alma materGonville and Caius College, Cambridge
Cambridge [BA 1938, MA 1941]
Known fornumber theory
Recreational mathematics
Strong Law of Small Numbers
unistable polyhedron
Scientific career
InstitutionsUniversity of Calgary
WebsiteUniversity of Calgary: Richard Guy

Guy was known for his work in number theory, geometry, recreational mathematics, combinatorics, and graph theory.[2][3] He is best known for co-authorship (with John Conway and Elwyn Berlekamp) of Winning Ways for your Mathematical Plays and authorship of Unsolved Problems in Number Theory.[4]

He also published over 300 papers.[5]

Guy died on 9 March 2020 in Calgary, Alberta, aged 103.[6]


  1. Albers & Alexanderson (2011) p. 320
  2. MMA (2016)
  3. Author biography from Winning Ways for your Mathematical Plays, Vol. I, 2nd ed., AK Peters, 2001.
  4. Roberts (2016)
  5. Scott (2012) p. 29
  6. Richard K. Guy (1916–2020)