D. Kazhdan introduced Prop- erty (T) in 1967. This property has been very useful and has been used among other things by G. Margulis to give the first explicit construction of expander graphs, and many famous lecture notes are available for supplementary reading.
Book:
Bachir Bekka, Pierre de la Harpe, and Alain Valette, Kazhdan’s property (T)
Term:
Spring
Year:
2016