Modul: MAT075 Zurich Graduate Colloquium

## What is... a Dedekind sum?

Talk by Alessandro Lägeler

**Date:** 02.11.21 **Time:** 16.30 - 17.30 **Room:**

Dedekind Sums first arose in the 19th century as correction terms of the transformation of the logarithm of a certain modular form. However, they are finite elementary sums and appear in a wide range of subjects as geometry, topology, computer science, and mathematical physics. In this talk, we will go the other way around: We start with a selection of examples of applications without any reference to modular forms. Towards the end, we discuss their connection to the Dedekind eta-function.