Peter Swinnerton-Dyer

Peter Swinnerton-Dyer was Sir Henry Peter Francis Swinnerton-Dyer, 16th Baronet, (2 August 1927 – 26 December 2018). 
He was an English mathematician. He worked in number theory at University of Cambridge. He was best known for his part in the Birch and Swinnerton-Dyer conjecture. This related algebraic properties of elliptic curves to special values of L-functions. Also, he worked on the Titan operating system.
In his youth, Swinnerton-Dyer was an international bridge player. He played for the British team twice in the European Open teams championship, in 1953 and 1962.