# Counting holes with Fourier transform

I will motivate the problem of counting holes on various quaternionic surfaces by recent developments in theoretical physics. An arithmetic Fourier transform technique will be discussed and as an application a proof of a conjecture of Kac from 1982 in the theory of infinite dimensional symmetry groups will be sketched.

**Speaker**Tamás Hausel, Section de Mathématiques, École Polytechnique Fédérale de Lausanne

**Time**Thursday | April 09, 2015 | 09:45am - 10:45am

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