Title：Dehn twist and monodromy in symplectic geometry
Abstract：Seidel in his paper  shows that the monodromy around a critical point of a Lefschetz fibration of an exact symplectic manifold is isotopic to the Dhen twist along a Lagrangian sphere. We follow his approach  to study the Dehn twist operation on Lagrangian submanifolds in the suspension of a symplectic manifold. The goal is to show that its categorical version is compatible with mirror symmetry and the mutation operation of sheaves.
 P. Seidel, long exact sequence of symplectic Floer homology
 P. Seidel, Fukaya categories and Picard Lefschetz theory
Time：Nov. 10 (Wed.), 2:00 p.m., 2021
Place：Room 212, Department of Mathematics, NTNU
Tea Time：Nov. 10 (Wed.), 1:30 p.m., 2021
Tea Place：Room 104, Department of Mathematics, NTNU