报告题目：Closed Reeb Orbits on Contact Three Manifold and Sphere with Symmetry

报告人：刘会（武汉大学）

时间：2023年4月13日    11：00 -12：00    

地点：腾讯会议号：654 382 682，无需密码

报告摘要：

In this talk, I will report our recent results on closed Reeb orbits, which include a complete characterization of Reeb flows on closed 3-manifolds with precisely two closed orbits, and also the existence of two symmetric closed Reeb orbits on dynamically convex contact (2n-1)-sphere with symmetry, especially I will explain the detailed proofs of these results. This talk is based on my joint work with Cristofaro-Gardiner, Hryniewicz and Hutchings, Abreu and Macarini.