Geometry and Topology Seminar —— A rigidity result for ancient Ricci flows
                    
                  
                  
                  
                    报告人:张旗
 
                    时间:2024-09-12 14:00-15:00
  
                    地点:智华楼413
                   
                  
                    【摘要】
Using the sharp log Sobolev functional (log entropy), we prove a qualitatively sharp rigidity result for ancient Ricci flows without sign condition on the curvatures. The result is also related to the backward limit problem of type II ancient Ricci flows.