Viktor Ginzburg
Viktor L. Ginzburg is a Russian-American mathematician who has worked on Hamiltonian dynamics and symplectic and Poisson geometry.
Ginzburg completed his Ph.D. at the University of California, Berkeley in 1990; his dissertation, On closed characteristics of 2-forms, was written under the supervision of Alan Weinstein.
He is best known for his work on the Conley conjecture, which asserts the existence of infinitely many periodic points for Hamiltonian diffeomorphisms in many cases, and for his counterexample to the Hamiltonian Seifert conjecture which constructs a Hamiltonian with an energy level with no periodic trajectories.
Some of his other more influential works concern coisotropic intersection theory, and Poisson Lie groups.
As of 2017, Ginzburg is Professor of Mathematics at the University of California, Santa Cruz.
He was elected as a Fellow of the American Mathematical Society in the 2020 Class, for "contributions to Hamiltonian dynamical systems and symplectic topology and in particular studies into the existence and non-existence of periodic orbits".
