Juris Hartmanis (born July 5, 1928) is a prominent computer scientist and computational theorist who, with Richard E. Stearns, received the 1993 ACM Turing Award "in recognition of their seminal paper which established the foundations for the field of computational complexity theory".Hartmanis was born in Latvia. He was a son of Mārtiņš Hartmanis, a general in the Latvian Army. After the Soviet Union occupied Latvia in 1940, Mārtiņš Hartmanis was arrested by Soviets and died in a prison.