Title：Perpetual cutoff method and discrete Ricci curvature

Speaker：Florentin Münch  (Potsdam University, Germany)

Time：2018年4月4日（周三）   下午  14:00-15:00

Room：东区管理科研楼  数学科学学院1518室

Abstract： We start giving an overview of Bakry-Emery and Ollivier curvature and corresponding gradient estimates which require global curvature bounds.We then introduce the perpetual cutoff method to give gradient estimates requiring the curvature bound not everywhere. As an application, we give a sharp distance bound to the set where no curvature bound is assumed.