David Rees (mathematician)
- For other persons named David/Dai Rees, see David/Dai Rees
|Born||29 May 1918|
|Died||16 August 2013(aged 95)|
|Alma mater||University of Cambridge|
|Doctoral students||Michael P. Drazin
Inder Bir Passi
|Known for||Rees algebra
Rees factor semigroup
Rees matrix semigroup
David Rees ScD Cantab, FIMA, FRS (Mathematics) (29 May 1918 – 16 August 2013) was an emeritus professor of pure mathematics at the University of Exeter, having been head of the Mathematics / Mathematical Sciences Department at Exeter for many years. During the Second World War, Rees was active on Enigma research in Hut 6 at Bletchley Park.
Rees initially worked on semigroup theory, and Rees factor semigroup is named after him. He also gave a characterization of completely simple and completely 0-simple semigroups, nowadays known as Rees' theorem. The matrix-based semigroups used in this characterization are called Rees matrix semigroups. At the behest of Douglas Northcott he switched his research focus to commutative algebra. In 1954, in a joint paper with Northcott, Rees introduced the Northcott-Rees theory of reductions and integral closures which has subsequently been influential in commutative algebra.
In 1993 Rees was awarded the Pólya Prize by the London Mathematical Society. In August 1998 a conference on Commutative Algebra was held at Exeter in honour of David Rees' 80th Year. He was an Honorary Fellow of Downing College, Cambridge
In 1952, he married Joan S. Cushen, who became a Senior Lecturer in Mathematics at Exeter, with four children:
- (Susan) Mary Rees FRS, Professor of Mathematics at the University of Liverpool, b. 1953
- Rebecca Rees, b. 1955
- Sarah E. Rees, Professor of Pure Mathematics at Newcastle University, b. 1957
- Deborah Rees, b. 1960
- "2013 death notices". Royal Society. Retrieved 2013-08-20. "Professor David Rees FRS, 29 May 1918 - 16 August 2013 (elected 1968), Emeritus Professor of Pure Mathematics, University of Exeter, Council service: 1979 - 1981"
- "Rees semi-group of matrix type - Encyclopedia of Mathematics". Eom.springer.de. 2011-02-07. Retrieved 2013-08-30.
- Rodney Sharp. "David Rees obituary | Education". theguardian.com. Retrieved 2013-08-30.
- Attila Nagy (2001). Special classes of semigroups. Springer. pp. 14–15. ISBN 978-0-7923-6890-8.
- Biographical memoirs of fellows of the Royal Society: Volume 53
- "Professor Douglas Northcott - Obituaries, News - The Independent". The Independent (London).
- "Downing College". Dow.cam.ac.uk. Retrieved 2013-08-30.
- GRO Register of Marriages: JUN 1952 4a 395 CAMBRIDGE - David Rees = Joan S. Cushen
- GRO Register of Births: SEP 1953 4a 294 CAMBRIDGE - Susan M. Rees, mmn = Cushen
- Asthana, Anushka. "Academics - Times Online". The Times (London).
- Professor Mary Rees FRS
- GRO Register of Births: DEC 1955 4a 222 CAMBRIDGE - Rebecca Rees, mmn = Cushen
- GRO Register of Births: DEC 1957 4a 338 CAMBRIDGE - Sarah E. Rees, mmn = Cushen
- Prof. Sarah Rees
- GRO Register of Births: JUN 1960 7a 442 EXETER - Deborah Rees, mmn = Cushen
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