Cecil C. Rousseau

Cecil Clyde Rousseau, Jr. (January 13, 1938 Philadelphia - April 10, 2020 Memphis)^[1][2] was a mathematician and author who specialized in graph theory and combinatorics. He was a professor at The University of Memphis starting in 1970 until retiring in 2008, and was involved with USAMO in many capacities, including serving as chair.^[3]

Rousseau received his Ph.D. in Physics in 1968 from Texas A&M University.^[4]

He has an Erdős number of 1, and is Erdős' 5th most common co-author, with 35 joint papers.^[5] He also frequently collaborated with Memphis faculty Ralph Faudree and Dick Schelp.

In 2012, Rousseau received the Paul Erdős Award from the World Federation of National Mathematics Competitions.^[6]

To his students and colleagues, he was known affectionately as C²R.