Geometria em Lisboa Seminar   RSS

Tian-Jun Li 14/07/2020, 17:00 — 18:00 Europe/Lisbon — Instituto Superior Técnico
, University of Minnesota

Symplectic rational $G$-surfaces and the plane Cremona group

We give characterizations of a finite group $G$ acting symplectically on a rational surface ($\mathbb{CP}^2$ blown up at two or more points). In particular, we obtain a symplectic version of the dichotomy of $G$-conic bundles versus $G$-del Pezzo surfaces for the corresponding $G$-rational surfaces, analogous to the one in algebraic geometry. The connection with the symplectic mapping class group will be mentioned.

This is a joint work with Weimin Chen and Weiwei Wu (and partly with Jun Li).

Current organizers: Rosa Sena Dias, José Mourão.
Zoom password: send an email to one of the organizers to ask for the password.