Ralph Fox

Ralph Fox
Born	(1913-03-24)March 24, 1913 Morrisville, Pennsylvania, U.S.
Died	December 23, 1973(1973-12-23) (aged 60) Philadelphia, Pennsylvania, U.S.
Alma mater	Swarthmore College Johns Hopkins University Princeton University
Known for	Compact-open topology Fox derivative Fox n-coloring Fox–Artin arc
Scientific career
Fields	Mathematics
Thesis	On the Lusternick–Schnirelmann Category (1939)
Doctoral advisor	Solomon Lefschetz
Doctoral students	Alan J. Goldman Francisco Javier González-Acuña Harold W. Kuhn Samuel J. Lomonaco Jr. Barry Mazur John Milnor John R. Stallings

Ralph Hartzler Fox (March 24, 1913 – December 23, 1973) was an American mathematician. As a professor at Princeton University, he taught and advised many of the contributors to the Golden Age of differential topology, and he played an important role in the modernization of knot theory and of bringing it into the mainstream.