Expanders, exact crossed products, and the Baum-Connes conjecture
We reformulate the Baum-Connes conjecture with coefficients by introducing a new crossed product functor for C*-algebras. All confirming examples for the original Baum-Connes conjecture remain confirming examples for the reformulated conjecture, and at present there are no known counterexamples to the reformulated conjecture. Moreover, some of the known expander-based counterexamples to the original Baum-Connes conjecture become confirming examples for our reformulated conjecture.
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K-Theory and Homology
Group Theory
Metric Geometry
Operator Algebras
Representation Theory
