Cohen代数和随机代数上超滤子的组合学
Combinatorics of ultrafilters on Cohen and random algebras
摘要:
在Tukey约化框架下研究了布尔代数上超滤子的结构。特别是,本文提供了几种技术来构造超滤子,这不是Tukey极大。此外,我们将这种分析与布尔代数的基数不变量,超滤数,并证明了一致性结果,其可能的值的科恩和随机代数。
英文摘要:
We investigate the structure of ultrafilters on Boolean algebras in the framework of Tukey reducibility. In particular, this paper provides several techniques to construct ultrafilters which are not Tukey maximal. Furthermore, we connect this analysis with a cardinal invariant of Boolean algebras, the ultrafilter number, and prove consistency results concerning its possible values on Cohen and random algebras.
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