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arXiv 1807.06129math.LO
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力迫公理、可逼近性与平稳集反射

Forcing axioms, approachability, and stationary set reflection

Sean D. Cox

AI总结:

本文证明平稳集反射与内部可逼近性的多种定理,指出Fuchino-Usuba蕴含不可逆,加强并简化Krueger结果,并借鉴Woodin思想统一力迫公理保持论证。

摘要:

我们证明了关于平稳集反射及与内部可逼近性相关概念的多种定理。我们证明了Fuchino-Usuba的一个将平稳反射与强Chang猜想的一个版本联系起来的蕴含关系不可逆;加强并简化了Krueger关于力迫公理与可逼近性的一些结果;并证明了Krueger的其他一些相关结果是精确的。我们还借鉴了Woodin的一些思想,以简化和统一文献中涉及力迫公理保持的许多论证。

英文摘要:

We prove a variety of theorems about stationary set reflection and concepts related to internal approachability. We prove that an implication of Fuchino-Usuba relating stationary reflection to a version of Strong Chang's Conjecture cannot be reversed; strengthen and simplify some results of Krueger about forcing axioms and approachability; and prove that some other related results of Krueger are sharp. We also adapt some ideas of Woodin to simplify and unify many arguments in the literature involving preservation of forcing axioms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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