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arXiv 1406.3302math.LO
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相干充分强制和保持CH

Coherent Adequate Forcing and Preserving CH

John Krueger, Miguel Angel Mota

摘要:

我们开发了一个一般的框架,强迫与连贯的充分集$H(λ)$作为侧条件,其中$λ\ge ω_2$是一个基数的不可数共尾性。我们描述了一类强迫偏序集,我们称之为相干适当型强迫。本文的主要定理是任何相干的适当类型的强迫保持CH.我们证明了存在一个强迫偏序集添加俱乐部子集的$ω_2$有限条件,同时保持CH,解决了弗里德曼的问题。

英文摘要:

We develop a general framework for forcing with coherent adequate sets on $H(λ)$ as side conditions, where $λ\ge ω_2$ is a cardinal of uncountable cofinality. We describe a class of forcing posets which we call coherent adequate type forcings. The main theorem of the paper is that any coherent adequate type forcing preserves CH. We show that there exists a forcing poset for adding a club subset of $ω_2$ with finite conditions while preserving CH, solving a problem of Friedman.

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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