David Rees, Welsh mathematician and academic (b. 1918)

David Rees FRS (29 May 1918 – 16 August 2013) was a British professor of pure mathematics at the University of Exeter, having been head of the Mathematics / Mathematical Sciences Department at Exeter from 1958-1983. During the Second World War, Rees was active on Enigma research in Hut 6 at Bletchley Park.