凯托内的问题及其他基数罪孽
Ketonen's question and other cardinal sins
AI总结:
本文通过分析ZFC模型的极限,证明弱康托尔基数携带不可分解超滤子不必可测,并解决其他两个关于强紧性和C序列数的问题。
摘要:
回答凯托恩在1970年代末提出的问题,证明了一个弱康托尔基数携带不可分解的超滤子并不需要是可测的。该结果通过分析ZFC模型的递减序列的极限获得。本文进一步展示了这种证明技术的实用性,其中还解决了Bagaria和Magidor关于强紧性的问题,以及Lambie-Hanson和Rinot关于C序列数的问题。
英文摘要:
Answering a question of Ketonen from the late 1970's, it is proved that a weakly compact cardinal carrying an indecomposable ultrafilter need not be measurable. The result is obtained by analyzing the limit of a decreasing sequence of models of ZFC. The utility of this proof technique is demonstrated further in this paper, where a problem by Bagaria and Magidor concerning strong compactness, and a problem by Lambie-Hanson and Rinot concerning the $C$-sequence number are solved as well.
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。