Thomas Ransford
Thomas Joseph Ransford (born 1 November 1958 in Greenwich, London) is a British-born Canadian mathematician. His work focuses on spectral theory, complex analysis, Banach algebras, and potential theory. He is a Canada Research Chair in mathematics at Université Laval.
Ransford earned his PhD at the University of Cambridge in 1984 with a thesis titled Analytic Multivalued Functions, supervised by Graham Allan. He was a fellow of Trinity College, Cambridge from 1983 to 1987.
He has published more than 90 research papers. He wrote the monograph Potential Theory in the Complex Plane (1995) and the graduate text A Primer on the Dirichlet Space (2014) with Omar El-Fallah, Karim Kellay, and Javad Mashreghi.
Notable results include the Mashreghi–Ransford inequality and a short elementary proof of the Stone–Weierstrass theorem.
Personal life: he is married to Line Baribeau and they have two children.
This page was last edited on 2 February 2026, at 18:00 (CET).