Operator Algebras Seminar
Speaker: Pieter Spaas (UCLA)
Title: Obstructions to lifting properties for full C*-algebras of property (T) groups
Abstract: We will introduce and discuss the lifting property (LP) and local lifting property (LLP) for full group C*-algebras, and see how they relate to certain notions of stability for groups. We will then introduce a new method to refute these properties, based on non-vanishing of second cohomology groups. This will allow us to derive that many natural examples of (relative) property (T) groups fail the LLP, and further large classes fail the LP. This is based on joint work with Adrian Ioana and Matthew Wiersma.
Meeting ID: 675 5936 5657
Passcode: OANCG