Modul: MAT075 Zurich Graduate Colloquium

## What are... points at infinity?

Merlin Incerti-Medici talk

**Date:** 08.10.19 **Time:** 17.15 - 18.30 **Room:**

Ever since the discovery of the hyperbolic plane, negatively curved spaces have been studied from many different points of view and have served to connect different areas of mathematics. One object that has been particularly useful in this endeavour is the boundary at infinity, which consists of all 'directions' in which one can walk to infinity. We will introduce the boundary at infinity, define several basic tools to work with it and illustrate its uses.