Talks by Hopkins and Willerton
Posted by Urs Schreiber
Since I already announced our next colloquium talk # I might just as well mention a few other interesting upcoming events  at least for those who spend the next month or so in central Europe.

In the context of the Andrejewski lecture series, Michael Hopkins gives a series of lectures on Topological aspects of topological field theory at the math institute of Universität Göttingen, consisting of three talks
 Tuesday 24. October, Introduction to topological field theories
 Wednesday 25. October, Topological methods in topological field theories
 Thursday 26. October, The WessZuminoWitten conformal blocks

In the first of next semester’s colloquium of our Center for Mathematical Physics, Simon Willerton will talk about Gerbes, groupoids and DijkgraafWitten theory, from the point of view of higher categories along the lines of Freed’s approach; November 9, here in Hamburg.
See for instance
S. Willerton
The twisted Drinfeld double of a finite group via gerbes and finite groupoids
math.QA/0503266