Kazhdan's property (T)
= Kazhdan's property (T)
{wiki=Kazhdan's_property_(T)}
Kazhdan's property (T) is a property of groups that was introduced by the mathematician David Kazhdan in the context of representation theory and geometric group theory. It is a strong form of compactness that relates to the representation theory of groups, particularly in how they act on Hilbert spaces.