Groupoid crossed-modules and cohomology
Speaker: Jean-Louis Tu, Universite de Lorraine, Metz
Abstract: 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
Room Number: 106 McAllister
Time: 2:30pm - 3:30pm