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Towers and Clubs

发布时间:2018年07月09日 09:50   浏览次数:
报告人 Pierre Matet教授 年月 2018-07
27

报告题目:Towers and Clubs

报告人:Pierre Matet教授(法国诺曼底大学)

报告时间:2018-07-27(周五)下午4:00-5:00

报告地点:数学学院西109

内容摘要

Afew years ago Saharon Shelah established an important result that showed that The diamond principle at regular uncountable cardinal often reduces to a (necessary) cardinalarithmetic assumption. We investigate what happens if this assumption is removed. One can expect to obtain a weaker form of diamond (◆) called club. But then among the consequences of diamond, which ones remain valid, especially in terms of almost disjoint stationary sets? This is where (ascending and descending) towers of stationary sets enter the picture.

邀请人:张树果 教授

 

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