The {L}aczkovich—{K}omjáth property for coanalytic equivalence relations

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Journal of Symbolic Logic 75 (3):1091-1101 (2010)
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Abstract

Let E be a coanalytic equivalence relation on a Polish space X and (A n ) n∈ω a sequence of analytic subsets of X. We prove that if lim sup n∈K A n meets uncountably many E-equivalence classes for every K ∈ [ω] ω , then there exists a K ∈ [ω] ω such that ⋂ n∈K A n contains a perfect set of pairwise E-inequivalent elements

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10.2178/jsl/1278682218

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Descriptive Set Theory.Yiannis Nicholas Moschovakis - 1982 - Studia Logica 41 (4):429-430.

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