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PhD, Princeton University, 1994 (Advisor: W.P. Thurston)
My interests include geometric group theory; low-dimensional topology; the interaction of differential geometry, Lie groups and their discrete subgroups; nonpositive curvature; as well as various interactions between topology, representation theory, algebraic geometry and number theory (especially concentrating on various moduli spaces, e.g. of polynomials, rational maps, Riemann surfaces, etc).