主讲人 Speaker：Prof. Chien-Hsun Wang (Taiwan Normal University)
时间 Time：2022/06/07 Tue. 3:00-4:30pm (Beijing time)
地点 Venue：Zoom Meeting ID: 984 962 1397 (no password needed)
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 Dehn 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 X and show that the Dehn twist on X is compatible with that on the suspension of X. Combined with , the categorical Dehn twist on the Fukaya category is compatible with local mirror symmetry and the mutation operation of sheaves of its mirror.
 P. Seidel, Long exact sequence of symplectic Floer homology
 P. Seidel, Fukaya categories and Picard Lefschetz theory
 T. Bridgeland, T-structures on some local Calabi-Yau varieties