题目：Convexity theorems in symplectic geometry and integrable Hamiltonian systems

报告人：Nguyen TienZung教授（University of Toulouse）

时间：2017年5月18日 周四 上午9:30 – 10:30

地点：理科楼A304

摘要：In this talk I'll give a breif review of convexity theorems in symplecticgeometry(from Shur-Horn to Kostant to Atiyah-Guillemin-Sternberg, Kirwan and so onto group-valued momentum maps and proper quasi-symplecticgroupoids, andDelzantpolytopes and integrableHamitlonian systems. Then I'll show some recent results(joint work mainly with Tudor Ratiu, and also with Ch. Wacheux) on convexity ofintegrableHamiltonian systems in the presence of focus-focus singularities, andpresymplecticrealizations of irrational convex polytopes.

联系人：陈酌