The Cardinality of the second uniform indiscernible

1992/05/01 by Greg Hjorth, Hjorth, Greg
Computer Science · Mathematics · #Advanced Algebra and Logic #FOS: Mathematics #History and Theory of Mathematics #Logic (math.LO) #Mathematics and Applications #math.LO

paper · pdf · doi:10.48550/arxiv.math/9205201

arxiv created 1992/05/01 · openalex publication_date 1992/05/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

When the second uniform indiscernible is ℵ₂, the Martin-Solovay tree only constructs countably many reals; this resolves a number of open questions in descriptive set theory.

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