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Non-K-exact uniform Roe C*-algebras
Published online by Cambridge University Press: 03 August 2010
Abstract
We prove that uniform Roe C*-algebras C*uX associated to some expander graphs X coming from discrete groups with property (τ) are not K-exact. In particular, we show that this is the case for the expander obtained as Cayley graphs of a sequence of alternating groups (with appropriately chosen generating sets).
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- Copyright © ISOPP 2010
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