Mathematician:John Cedric Shepherdson

Mathematician

English mathematician who worked in ring theory and mathematical logic.

Co-designer (with Howard E. Sturgis) of the Unlimited Register Machine, a refinement of the Turing machine.

Nationality

English

History

• Born: 7 June 1926 in Huddersfield, Yorkshire, England
• Died: 8 January 2015 in Bristol, England

Theorems and Definitions

• Unlimited Register Machine

Publications

• 1947: On the Addition of Elements of a Sequence
• 1951: Inverses and Zero Divisors in Matrix Rings
• 1951: Well-ordered Sub-series of General Series

• 1963: Computability of Recursive Functions (J. ACM Vol. 10, no. 2: pp. 217 – 255) (with H.E. Sturgis)

Sources

• John J. O'Connor and Edmund F. Robertson: "John Cedric Shepherdson": MacTutor History of Mathematics archive