Rigid measures on G-spaces (Mehrdad Kalantar, University of Houston)

02.06.2020 16:30

Let G be a topological group acting on a compact Hausdorff space X. We say a quasi-invariant Borel probability measure \nu on X is (G-)rigid if there is a unique G-equivariant unital positive map from C(X) to L^\infty(X, \nu). We give several examples of such measures, review some basic facts, and present applications in rigidity problems concerning unitary representations and operator algebras associated to the group G.
This is joint work with Yair Hartman.

Lieu

Join the Zoom session https://unige.zoom.us/j/696379617, Password : Exxxx (We gave his name to a very useful characteristic) Att. heure inhabituelle, Séminaire "Groupes et Géométrie"

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Fichiers joints

Geneva - Group theory virtual seminar-slides.pdf

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