Topics in orbit equivalence
by A. S. Kechris
This volume provides a self-contained introduction to some topics in orbit equivalence theory, a branch of ergodic theory. The first two chapters focus on hyperfiniteness and amenability. Included here are proofs of Dye's theorem that probability measure-preserving, ergodic actions of the integers are orbit equivalent and of the theorem of Connes-Feldman-Weiss identifying amenability and hyperfiniteness for non-singular equivalence relations. The presentation here is often influenced by descriptive set theory, and Borel and generic analogs of various results are discussed. The final chapter is a detailed account of Gaboriau's recent results on the theory of costs for equivalence relations and groups and its applications to proving rigidity theorems for actions of free groups.
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Includes bibliographical references (p. 129-130) and index.
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- Created April 1, 2008
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| April 21, 2025 | Edited by ImportBot | Redacting ocaids |
| December 15, 2024 | Edited by MARC Bot | import existing book |
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| February 25, 2022 | Edited by ImportBot | import existing book |
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