Incomparable treeable equivalence relations

Journal of Mathematical Logic 12 (1):1250004- (2012)
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Abstract

We establish Hjorth's theorem that there is a family of continuum-many pairwise strongly incomparable free actions of free groups, and therefore a family of continuum-many pairwise incomparable treeable equivalence relations.

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10.1142/s0219061312500043

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Countable borel equivalence relations.S. Jackson, A. S. Kechris & A. Louveau - 2002 - Journal of Mathematical Logic 2 (01):1-80.

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