## CYMS Seminar - Jia-Wei Guo (National Taiwan University)

### Thursday, February 6th, 2020

**Time:** 3:00 p.m ** Place:** Jeffery Hall 319

**Speaker:** Jia-Wei Guo (National Taiwan University)

**Title:** Class number relations arising from intersections of Shimura curves and Humbert surfaces.

**Abstract:** By considering the intersections of Shimura curves and Humbert surfaces on the Siegel modular threefold, we obtain new class number relations. The result is a higher-dimensional analogue of the classical Hurwitz-Kronecker class number relation. This is a joint work with Yifan Yang.