Pcf theory and cardinal invariants of the reals

Commentationes mathematicae Universitatis Carolinae

Lajos Soukup¹ 

关键词: cardinal invariants;    reals;    pcf theory;    null sets;    meager sets;    Baire space;    additivity;   

DOI  :  

学科分类：物理化学和理论化学

来源: Univerzita Karlova v Praze * Matematicko-Fyzikalni Fakulta / Charles University in Prague, Faculty of Mathematics and Physics

【 摘 要 】

The {\it additivity spectrum\/} $\operatorname{ADD}(\mathcal{I})$ of an ideal $\mathcal{I}\subset \mathcal{P}(I)$ is the set of all regular cardinals $\kappa$ such that there is an increasing chain $\{A_\alpha\alpha.

【 授权许可】

CC BY