Alan Weinstein

Alan David Weinstein, born in New York City in 1943, is a professor of mathematics at the University of California, Berkeley, whose work centres on differential geometry and especially Poisson geometry. He studied at the Massachusetts Institute of Technology and took his doctorate at Berkeley in 1967 under Shiing-Shen Chern. His research touches Riemannian and symplectic geometry, Lie groupoids, geometric mechanics and deformation quantization. Among his best known contributions are a tubular neighbourhood theorem for Lagrangian submanifolds, the Marsden-Weinstein quotient of reduction theory developed with Jerrold Marsden, the Weinstein conjecture on periodic orbits, the symplectic creed that everything is a Lagrangian submanifold, and symplectic groupoids. He has supervised 35 doctoral students.