We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
We show that a natural generalization of compressibility is the sole obstruction to the existence of a cocycle-invariant Borel probability measure.
Becker, H. and Kechris, A. S.. The Descriptive Set Theory of Polish Group Actions(London Mathematical Society Lecture Note Series, 232). Cambridge University Press, Cambridge, 1996.CrossRefGoogle Scholar
[DJK94]
Dougherty, R., Jackson, S. and Kechris, A. S.. The structure of hyperfinite Borel equivalence relations. Trans. Amer. Math. Soc.341(1) (1994), 193–225.CrossRefGoogle Scholar
[FM77]
Feldman, J. and Moore, C. C.. Ergodic equivalence relations, cohomology, and von Neumann algebras. I. Trans. Amer. Math. Soc.234(2) (1977), 289–324.CrossRefGoogle Scholar
[Hop32]
Hopf, E.. Theory of measure and invariant integrals. Trans. Amer. Math. Soc.34(2) (1932), 373–393.CrossRefGoogle Scholar
[Kec95]
Kechris, A. S.. Classical Descriptive Set Theory(Graduate Texts in Mathematics, 156). Springer, New York, 1995.CrossRefGoogle Scholar
[KM04]
Kechris, A. S. and Miller, B. D.. Topics in Orbit Equivalence(Lecture Notes in Mathematics, 1852). Springer, Berlin, 2004.CrossRefGoogle Scholar
[KST99]
Kechris, A. S., Solecki, S. and Todorcevic, S.. Borel chromatic numbers. Adv. Math.141(1) (1999), 1–44.CrossRefGoogle Scholar
[Mil08a]
Miller, B. D.. The existence of measures of a given cocycle. II. Probability measures. Ergod. Th. & Dynam. Sys.28(5) (2008), 1615–1633.CrossRefGoogle Scholar
[Mil08b]
Miller, B.. The existence of measures of a given cocycle. I. Atomless, ergodic 𝜎-finite measures. Ergod. Th. & Dynam. Sys.28(5) (2008), 1599–1613.CrossRefGoogle Scholar
[MVN36]
Murray, F. J. and Von Neumann, J.. On rings of operators. Ann. of Math. (2)37(1) (1936), 116–229.CrossRefGoogle Scholar
[Nad90]
Nadkarni, M. G.. On the existence of a finite invariant measure. Proc. Indian Acad. Sci. Math. Sci.100(3) (1990), 203–220.CrossRefGoogle Scholar
[Wei84]
Weiss, B.. Measurable dynamics. Conference in Modern Analysis and Probability (New Haven, Conn., 1982)(Contemporary Mathematics, 26). American Mathematical Society, Providence, RI, 1984, pp. 395–421.CrossRefGoogle Scholar