# Dirac Operator

 K-THEORY OF GROUP C* ALGEBRAS (AN INTRODUCTION TO K-THEORY AND THE BAUM-CONNES CONJECTURE) Topic: Dirac Operator Speaker: Paul Baum Affiliation: IAS Date: Tuesday, December 7 Time/Room: 2:00pm - 3:00pm/S-101

A SpinC-manifold is a C\infty manifold with a given structure which is slightly stronger than an orientation. A Spin C manifold has a Dirac operator. This is a first order elliptic differential operator. The (equivariant) indices of these Dirac operators can be used to formulate BC for discrete groups.