Robert Rosenbaum, University Professor of Mathematics and the Sciences, Emeritus, died on Dec. 3 at the age of 102. Rosenbaum received his AB from Yale in 1936, and his PhD in mathematics from Yale in 1947. He joined the Wesleyan faculty in 1953 and taught mathematics here for 42 years until he retired in 1995. He was a member of the “Mystic Nine” — a group of faculty in the early 1960s who were instrumental in developing Wesleyan’s graduate programs. He became dean of sciences in 1963, provost in 1965, the first-ever vice president of academic affairs and provost in 1967, and chancellor…