题目:Optimal lower bounds for first eigenvalues of Riemann surfaces for large genus
时间:2020年10月5日 10:30—11:30
地点:数博彩平台425
摘要:In this talk we discuss the first eigenvalues of closed hyperbolic surfaces for large genus. We show that for every closed hyperbolic surface                                                 of genus
 of genus  , the first eigenvalue of
, the first eigenvalue of  is greater than
 is greater than  up to a uniform positive constant multiplication. Here
 up to a uniform positive constant multiplication. Here  is the shortest length of simple closed multi-geodesics separating
 is the shortest length of simple closed multi-geodesics separating  . Moreover, we also show that this new lower bound is optimal as
. Moreover, we also show that this new lower bound is optimal as  .
.
 
报告人简介:吴云辉,清华大学长聘副教授,“海外高层次青年人才”入选者。主要研究方向为Teichmuller理论与几何,曾先后在Crelle’s Journal、J. Differential Geom、Math. Ann、Proc. Lond. Math. Soc 等国际知名数学期刊发表论文多篇。2012年博士毕业于美国布朗大学;2012-2016年期间担任美国莱斯大学的 “Evans讲席教师”;2016年至今任职于清华大学丘成桐数学科学中心。