Seminar series
Date
Thu, 13 Feb 2014
Time
14:45 -
15:45
Location
L4
Speaker
Tobias Dyckerhoff
Organisation
University of Oxford
Crossed simplicial groups were introduced independently by Krasauskas and Fiedorowicz-Loday as analogues of Connes' cyclic category. In this talk, I will explain a new perspective on a certain class of crossed simplicial groups, relating them to structured surfaces. This provides a combinatorial approach to categorical invariants of surfaces which leads to known, expected, and new examples. (Based on joint work with Mikhail Kapranov.)