题目：Convexity properties of presymplectic Hamiltonian actions

报告人：Reyer Sjamaar (Cornell University)

摘要：A celebrated theorem in symplectic geometry, due to Atiyah, Guillemin-Sternberg and Kirwan, states that the image of the moment map of a compact Lie group action is a convex polytope. I will present a generalization of this result, obtained in joint work with Yi Lin, to compact Lie group actions on presymplectic manifolds. Our result implies convexity theorems for actions on contact manifolds, cosymplectic manifolds, as well as certain symplectic "generalized manifolds".

时间：2017年2月3日（周五）上午10:30-12:00

地点：565net必赢客户端新教二北楼509教室

欢迎全体师生积极参加！