Geodesic
Separating equivalence classes
Commentationes Mathematicae Universitatis Carolinae, Tome 59 (2018) no. 4, pp. 531-540.

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Given a countable Borel equivalence relation, I introduce an invariant measuring how difficult it is to find Borel sets separating its equivalence classes. I evaluate these invariants in several standard generic extensions.
DOI : 10.14712/1213-7243.2015.267
Classification : 03E15, 03E17
Keywords: countable Borel equivalence relation; forcing 
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Zapletal, Jindřich. Separating equivalence classes. Commentationes Mathematicae Universitatis Carolinae, Tome 59 (2018) no. 4, pp. 531-540. doi : 10.14712/1213-7243.2015.267. http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.2015.267/

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