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Amenability and hyperfiniteness for group actions on trees

By Pieter Spaas

Appears in collection : Group operator algebras and Non commutative geometry / Algèbres d'opérateurs de groupes et Geometrie non commutative

We identify natural conditions on group actions on trees which imply that the induced action on the boundary is (Borel/measure) hyperfinite. We will consider the differences between the Borel and measurable versions, and discuss different notions of amenability which arise in the proofs.

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Citation data

  • DOI 10.24350/CIRM.V.20166103
  • Cite this video Spaas, Pieter (25/04/2024). Amenability and hyperfiniteness for group actions on trees. CIRM. Audiovisual resource. DOI: 10.24350/CIRM.V.20166103
  • URL https://dx.doi.org/10.24350/CIRM.V.20166103

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