Exotic symplectomorphisms and contact circle actions

Speaker: Prof. Igor Uljarevic，University of Belgrade

Title: Exotic symplectomorphisms and contact circle actions

Language: Chinese

Time & Venue: 2026.07.13 13:30-14:30 MCM410

Abstract: I will explain a relation between exotic symplectomorphisms of a Liouville domain and contact circle actions on its boundary. In particular, I will show that the non-existence of exotic symplectomorphisms of the standard symplectic ball implies a rather strict topological condition on the free contact circle actions on the standard contact sphere. The talk is based on joint work with Dušan Drobnjak.