# Princeton/IAS Symplectic Geometry Seminar

**Topic: **Quantum periods theorem for Landau-Ginzburg potentials

**Speaker: **Dmitry Tonkonog

**Affiliation: **University of California, Berkeley

**Date & Time: **Monday February 19th, 2018, 4:00pm - 5:00pm

**Location: **Fine Hall 322, Princeton University

I will report on recently discovered relations between closed Gromov-Witten theory of a Fano variety and open Gromov-Witten theory of Lagrangian submanifolds contained in it. The focus will be on the result saying that the quantum period of a Fano variety equals the classical period of the Landau-Ginzburg potential of any monotone Lagrangian torus sitting inside. This has applications "in both directions", including the classification of potentials of tori in CP2, and a proof of the quantum Lefschetz hyperplane theorem in the symplectic category.