Speaker：Yi Lai（Stanford University，US）

Time：2022-12-15, 10:00

Location：Tencent Meeting ID：977710737（No Password）

Abstract:

For any 3D steady gradient Ricci soliton with positive curvature, if it is asymptotic to a ray we prove that it must be isometric to the Bryant soliton. Otherwise, it is asymptotic to a sector and called a flying wing. We show that all flying wings are O(2)-symmetric. Hence, all 3D steady gradient Ricci solitons are O(2)-symmetric.