EVENT DETAILS AND ABSTRACT

Title: The Euler class of groups acting on the plane
Speaker: Danny Calegari
Speaker Info: Caltech
Brief Description:
Special Note:
Abstract:

We give a complete homological classification of actions of surface groups on the plane, in every degree of smoothness. The most interesting case involves actions of Z+Z which are at least C^1 or smoother; the analysis of such actions uses theorems of Brouwer and Morton Brown.