Etale approximations and the mod ℓ cohomology of GL n

Abstract

In this paper, we present counter-examples to the unstable version of a conjecture postulating the relationship between cohomology of arithmetic groups and the “etale models” of their classifying spaces.KeywordsExact SequencePrime IdealNoetherian RingArithmetic GroupPrincipal Ideal DomainThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.