For more information about this meeting, contact Calder Daenzer, Mathieu Stienon, Mari Royer, Nigel Higson, Ping Xu.
|Title:||Groupoid crossed-modules and cohomology|
|Speaker:||Jean-Louis Tu, Universite de Lorraine, Metz|
|It is well-known that bundle gerbes on a manifold, possibly endowed with an action of a Lie group, can be defined in terms of central extensions of Lie groupoids, which are classified by a second cohomology group. In this talk, we will explain the analogue for bundle 2-gerbes, and see how the language of groupoids can conveniently explain the existence of a product in equivariant twisted K-theory.|
Room Reservation Information
|Date:||08 / 27 / 2013|
|Time:||02:30pm - 03:30pm|