Amenability and hyperfiniteness for group actions on trees | Vidéo | Carmin.tv

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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.

Information about the video

Date of recording 25/04/2024
Date of publication 13/05/2024
Institution CIRM
Licence CC BY NC ND
Language English
Audience Researchers, Graduate Students
Director(s) Guillaume Hennenfent
Format MP4

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

Domain(s)

Bibliography

ELAYAVALLI, Srivatsav Kunnawalkam, OYAKAWA, Koichi, SHINKO, Forte, et al. Hyperfiniteness for group actions on trees. arXiv preprint arXiv:2307.10964, 2023. - https://doi.org/10.48550/arXiv.2307.10964

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