Non-commutative Geometry III: Crossed Product and Orbit Space of Group Actions

Series
Geometry Topology Working Seminar
Time
Friday, October 29, 2010 - 2:00pm for 2 hours
Location
Skiles 171
Speaker
Jean Bellissard – Ga Tech
Organizer
John Etnyre

Please Note: Note this is a 2 hour talk.

An action of the real line on a compact manifold defines a topological dynamical system. The set of orbits might be very singular for the quotient topology. It will be shown that there is, however, a C*-algebra, called the crossed product, which encodes the topology of the orbit space. The construction of this algebra can be done for an group action, if the group is locally compact.