# Events

## Friday, October 6, 2017

### Geometry and Topology Seminar

Friday, October 6, 2017 — 2:30 PM EDT

Ajneet Dhillon, University of Western Ontario

"Tamagawa numbers and connected components of stacks"

Let X be a smooth projective curve over a finite field and $G$ a semisimple algebraic group over its function field. Let $\mathcal{G}$ be a smooth group scheme over X with generic fiber $G$. The Tamagawa number of $G$ is an arithmetic invariant obtained from a Haar measure on the adelic points of $G$. A conjecture of Harder relates this number to the number of components of the moduli stack of $\mathcal{G}$-bundles.

### Analysis Seminar

Friday, October 6, 2017 — 3:30 PM EDT

Ping Zhong, Department of Pure Mathematics, University of Waterloo

"Estimates for compression norms and additivity violation in quantum information"

### October 2017

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