Montreal Geometric & Combinatorial Group Theory Seminar



Speaker: Bogdan Nica (McGill)

Title: “A guided tour to Kazhdan's property-T”

Date: 3:30pm Wednesday, March 5th.

Room: 920 Burnside



Introduced by D. Kazhdan in the late 60's, property-T is a

representation-theoretic form of rigidity. Well-known applications of

property-T include: classifying normal subgroups of lattices, proving

uniqueness of measures on spheres and constructing graphs of high


This talk is intended as an overview of Kazhdan's property-T. We will

discuss various equivalent definitions, as well as basic examples, many of them arising from group actions.