J. Barkley Rosser

John Barkley Rosser Sr. (December 6, 1907 – September 5, 1989) was an American logician, a student of Alonzo Church, and known for his part in the Church–Rosser theorem in lambda calculus. He also developed what is now called the "Rosser sieve" in number theory. He was part of the mathematics department at Cornell University from 1936 to 1963, chairing it several times.

Rosser's son, John Barkley Rosser Jr. (1948–2023), was a mathematical economist and professor at James Madison University in Harrisonburg, Virginia.

Selected publications 1934: A mathematical logic without variables, Univ. Diss. Princeton, NJ, p. 127–150, 328–355 1953: Logic for mathematicians, McGraw-Hill 2nd edition, Chelsea Publ. Co. 1978, 578 p., 1969: Simplified Independence Proofs: Boolean Valued Models of Set Theory, Academic Press 1984: "Highlights of the History of Lambda calculus", Annals of the History of Computing 6(4): 337–349 See Barkley Rosser papers at University of Texas