Property $(T)$ for noncommutative universal lattices

Details Property $(T)$ for noncommutative universal lattices Property $(T)$ for noncommutative universal lattices

2008-09-24

arxiv.org/abs/0809.4095v2

Inventiones Mathematicae 179 (2010), no. 2, 303-347

Mathematics

Group Theory

47 pages; final version

Scientific paper

10.1007/s00222-009-0218-2

We establish a new spectral criterion for Kazhdan's property $(T)$ which is applicable to a large class of discrete groups defined by generators and relations. As the main application, we prove property $(T)$ for the groups $EL_n(R)$, where $n\geq 3$ and $R$ is an arbitrary finitely generated associative ring. We also strengthen some of the results on property $(T)$ for Kac-Moody groups from a paper of Dymara and Januszkiewicz (Invent. Math 150 (2002)).

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