报告人:Prof.LI, Songying (UC Irvine, USA) 

题目：Sharp lower bound estimates for the first positive eigenvalue and rigidity theorem for sub-Laplacian and Kohn Laplacian  

时间：7月24日下午4:30---6:00
地点：理科楼407
摘要: In this talk, I will present the Lichnerowicz-Obata type theorems for the first positive eigenvalue of the Laplacian on Riemannian manifold. I will also present a joint work with X. Wang on the lower bound and the rigidity theorems of the first positive eigenvalue for sub-Laplacian; and a joint work with S. Duong and X. Wang on the fist positive eigenvalue for Kohn Laplacian on the pseudo-Hermitian manifolds. 

  欢迎感兴趣的老师和同学们参加！