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arXiv 1306.5399math.LO
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所有正则不可数基数的许多强迫公理

Many forcing axioms for all regular uncountable cardinals

Saharon Shelah

摘要:

我们最初的目的是,在阿贝尔群理论中证明的一致性:λ是强极限奇异的和一些性质的阿贝尔群是自由的亲戚,在奇异的紧失败。事实上,这应该工作的R-模块等,因为在以前的情况下,部分工作是分析如何移动之间的集合论和代数。从理论上讲,我们试图强迫一个宇宙满足G.C.H.菱形对许多静止集合成立,但对每个正则不可数λ,在某种意义上,任何“可能”对某个平稳集成立的东西,对某个平稳集也成立。更具体地说,我们试图得到一个满足GCH的论域,使得例如对于正则kappa < lambda,存在对(S,B),S \subseteq S^λ_κstationary,B \subseteq H(lambda),它满足与(S,B)相关的某个预先给定的强制公理,(因此(lambda\ S)-完备,即“在S之外平凡”),但不再是,即稍微强一些的版本失败。从理论上讲我们试图得到一个满足几何中心H的宇宙。但仍然满足“许多”,甚至在某种意义上的一个最大的家庭,强制公理的形式“为一些平稳”,同时保持GCH。由于完成的工作滞后了一段时间,在这里我们只处理的集合论。

英文摘要:

Our original aim was, in Abelian group theory to prove the consistency of: lambda is strong limit singular and for some properties of abelian groups which are relatives of being free, the compactness in singular fails. In fact this should work for R-modules, etc. As in earlier cases part of the work is analyzing how to move between the set theory and the algebra. Set theoretically we try to force a universe which satisfies G.C.H. and diamond holds for many stationary sets but, for every regular uncountable lambda, in some sense anything which "may" hold for some stationary set, does hold for some stationary set. More specifically we try to get a universe satisfying GCH such that e.g. for regular kappa < lambda there are pairs (S,B), S \subseteq S^λ_κstationary, B \subseteq H (lambda), which satisfies some pregiven forcing axiom related to (S,B), (so (lambda\ S)-complete, i.e. "trivial outside S) but no more, i.e. slightly stronger versions fail. So set theoretically we try to get a universe satisfying G.C.H. but still satisfies "many", even for a maximal family in some sense, of forcing axioms of the form "for some stationary" while preserving GCH. As completion of the work lagged for a while, here we deal only with the set theory.

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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