What Columbia University professor proved the Earle-Hamilton fixed-point theorem with Clifford Earle in 1968?
Richard S. Hamilton Richard Streit Hamilton (born 1943) is Davies Professor of Mathematics at Columbia University.
Linda Keen Linda Jo Goldway Keen (born 9 August 1940 in New York City, New York) is a mathematician and a fellow of the American Mathematical Society. Since 1965, she has been a Professor in the Department of Mathematics and Computer Science at Lehman College of The City University of New York and a Professor of Mathematics at The Graduate Center of The City University of New York.