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A theorem on ROD‐hypersmooth equivalence relations in the Solovay model
Author(s) -
Kanovei Vladimir,
Reeken Michael
Publication year - 2003
Publication title -
mathematical logic quarterly
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.473
H-Index - 28
eISSN - 1521-3870
pISSN - 0942-5616
DOI - 10.1002/malq.200310030
Subject(s) - mathematics , equivalence relation , equivalence (formal languages) , borel equivalence relation , pure mathematics , borel measure , discrete mathematics , probability measure
It is known that every Borel hypersmooth but non‐smooth equivalence relation is Borel bi‐reducible to E 1 . We prove a ROD version of this result in the Solovay model.