Thin equivalence relations in scaled pointclasses

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Mathematical Logic Quarterly 57 (6):615-620 (2011)
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Abstract

For ordinals α beginning a Σ1 gap in equation image, where equation image is closed under number quantification, we give an inner model-theoretic proof that every thin equation image equivalence relation is equation image in a real parameter from the hypothesis equation image

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10.1002/malq.200920050

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Some applications of coarse inner model theory.Greg Hjorth - 1997 - Journal of Symbolic Logic 62 (2):337-365.

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