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math.OA2004
Groupoid cohomology and extensions
Jean-Louis Tu
We show that Haefliger's cohomology for etale groupoids, Moore's cohomology for locally compact groups and the Brauer group of a locally compact groupoid are all particular cases o…
math.OA2004
Non-Hausdorff groupoids, proper actions and K-theory
Jean-Louis Tu
Let G be a (not necessarily Hausdorff) locally compact groupoid. We introduce a notion of properness for G, which is invariant under Morita-equivalence. We show that any generalize…