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详细信息    查看全文

• 作者：Justin Tatch Moore ; Sł ; awomir Solecki
• 关键词：Ideal of compact sets ; Tukey reduction
• 刊名：Annals of Pure and Applied Logic
• 出版年：2008
• 出版时间：December 2008
• 年：2008
• 卷：156
• 期：2-3
• 页码：270-273
• 全文大小：344 K

文摘

We prove that there is a -ideal of compact sets which is strictly above in the Tukey order. Here is the collection of all compact nowhere dense subsets of the Cantor set. This answers a question of Louveau and Veličković asked in [Alain Louveau, Boban Veličković, Analytic ideals and cofinal types, Ann. Pure Appl. Logic 99 (1–3) (1999) 171–195].