## Geometry Seminar - Abstracts

### Talk

Wednesday 25 September 2019, 16:00-17:00 in HG02.802

**Zhiyu Tian** (Beijing International Center for Mathematical Research)

*Separable rational connectedness in positive characteristic*

### Abstract

Rationally connected varieties are higher dimensional analogues of
rational surfaces, which share many of the properties of rational
surfaces. However, in positive characteristic, one needs the notion of
separable rational connectedness to avoid certain pathologies. I will
report on a joint work with Jason Starr on characterising separable
rational connnectedness, and if time permits, some applications for weak
approximation.

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