About Me

I am a Distinguished Professor in the Mathematics Department of the City College of New York and the CUNY Graduate Center.

I received my Ph.D. at the University of California at Berkeley. I am an algebraist interested in a broad range of areas including semigroups, geometric group theory, algebraic combinatorics and representation theory.

Some of my other research interests include automata theory, finite state Markov chains and algebras associated to étale groupoids.

Areas of Work

My research touches on a wide spectrum of algebraic and combinatorial structures, with an eye toward computational and algorithmic applications.