# HaoHua Deng : Mumford-Tate Groups and the Hodge locus of period maps

Mumford-Tate groups together with their associated Mumford-Tate domains, as their definitions, tell rich information about Hodge classes. While Abelian varieties with complex multiplication serve as (relatively simple) examples, the study on Mumford-Tate groups in general cases could be much more complicated. In this expository talk I will briefly summarize the literature in the view of algebraic geometry and representation theory. The relation between Mumford-Tate groups and the Hodge-generic properties of period maps will be emphasized. I will also talk about some recent applications, including part of the latest results on the distribution of Hodge locus worked out by Baldi-Klingler-Ullmo. The talk is supposed to be accessible for graduate students in algebraic geometry or related fields.

**Category**: Algebraic Geometry**Duration**: 01:34:48**Date**: April 15, 2022 at 3:10 PM-
**Tags:**seminar, Algebraic Geometry Seminar

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