Differential Geometry Seminar

Biao Ma
"Almost rigidity results with lower Ricci bound by Cheeger & Colding, Continued."

Two basic rigidity theorems of nonnegative Ricci curvature manifolds are the maximum diameter theorem and the splitting theorem. Each of them asserts if some geometric quantity (diameter) is as large as possible then the metric has to be a warped product of a particular type. Cheeger-Colding 1996 and Colding 1996 showed that if some quantity is almost maximal then the almost rigidity result hold in the sense that the given space is close to the model space under Gromov-Hausdorff distance. I will continue the talk and explain more technical details.

Event Date: 
September 17, 2019 - 2:30pm to 3:20pm
221 MLH
Calendar Category: 
Seminar Category: 
Differential Geometry