## a $\operatorname{CAT}(0)$ space?

Who?
Sebastian Meinert (FU Berlin)
When?
2014/11/14, 13:30
Before the BMS Kovalevskaya Colloquium by Prof. Stephanie B. Alexander
Where?
Urania Berlin, at the BMS Loft (3rd floor)
A $\operatorname{CAT}(0)$ space is a metric space in which geodesic triangles are at most as thick as in Euclidean space. We will make this notion precise and explain some basic features of $\operatorname{CAT}(0)$ spaces, like contractibility.