1945
Born in Chicago, Illinois to Harry and Helen Nora Cohen.
1967
Receives a Bachelor of Arts from Brandeis University.
1972
Receives a Doctor of Mathematics from the University of Chicago.
1972
Receives a Doctor of Philosophy from the University of Chicago.
1972
Becomes an assistant and then associate professor at Northern Illinois University.
1976
Marries Kathleen Marie Whalen.
1979
Becomes an associate and then full professor at the University of Kentucky.
1979
Receives the A.P. Sloan Foundation Fellowship to conduct mathematics research through 1983.
1983
Attends the International Congress of Mathematics in Poland as an invited speaker.
1988
Serves on the editorial board of “Forum Mathematicum” for Walter de Gruyter.
1988
Becomes a member of the editorial board of the American Mathematical Society.
1989
Becomes a professor at the University of Rochester.
2005
Attends the 60th Birthday Conference at the University of Tokyo as the honoree.
2006
Becomes a grantee of the DARPA program SToMP through 2011 which leads to exciting mathematical research.
2008
Receives the Goergen Award for Distinguished Achievement and Artistry in Undergraduate Education from the University of Rochester.
2012
Becomes an American Math Society Inaugural Fellow.
2015
Serves as a lecturer for Namboodiri lectures in geometry and topology at the University of Chicago.