Mathematics professor at Rutgers University in Newark. Researcher in Topology, Geometry, and Geometric Group Theory. Currently specializing in the large scale geometry of $Out(F_n)$, the outer automorphism group of a free group of finite rank $n$.
26 Connected sum of topological manifolds Feb 12 '13
20 Actions on Sⁿ with quotient Sⁿ Jul 25 '12
19 Periodic automorphisms of free groups Apr 25 '12
19 Conjugacy classes of $SL_2(Z)$ Apr 13
18 Manifolds with two coordinate charts Dec 28 '12
15 Was the early calculus inconsistent? Mar 20 '13