Born in Chicago, Illinois to Harry and Helen Nora Cohen.
Receives a Bachelor of Arts from Brandeis University.
Receives a Doctor of Mathematics from the University of Chicago.
Receives a Doctor of Philosophy from the University of Chicago.
Becomes an assistant and then associate professor at Northern Illinois University.
Marries Kathleen Marie Whalen.
Becomes an associate and then full professor at the University of Kentucky.
Receives the A.P. Sloan Foundation Fellowship to conduct mathematics research through 1983.
Attends the International Congress of Mathematics in Poland as an invited speaker.
Serves on the editorial board of “Forum Mathematicum” for Walter de Gruyter.
Becomes a member of the editorial board of the American Mathematical Society.
Becomes a professor at the University of Rochester.
Attends the 60th Birthday Conference at the University of Tokyo as the honoree.
Becomes a grantee of the DARPA program SToMP through 2011 which leads to exciting mathematical research.
Receives the Goergen Award for Distinguished Achievement and Artistry in Undergraduate Education from the University of Rochester.
Becomes an American Math Society Inaugural Fellow.
Serves as a lecturer for Namboodiri lectures in geometry and topology at the University of Chicago.