##### Department of Mathematics,

University of California San Diego

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### Math 258 - Differential Geometry

## Pak Yeung Chan

#### UCSD

## On Ricci flows with closed and smooth tangent flows

##### Abstract:

We consider Ricci flows admitting closed and smooth tangent flows in the sense of Bamler 20. The tangent flow in question can be either a tangent flow at infinity for an ancient Ricci flow, or a tangent flow at a singular point for a Ricci flow developing a finite-time singularity. In these cases, we show that the tangent flow is unique and the singularity is of Type I. This talk is based on a joint work with Zilu Ma and Yongjia Zhang.

### April 14, 2022

### 11:00 AM

APM 7321

Zoom ID 924 6512 4982

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