Article ID Journal Published Year Pages File Type
4613980 Journal of Mathematical Analysis and Applications 2017 11 Pages PDF
Abstract

We study ideals II on NN satisfying the following Baire-type property: if X is a complete metric space and  {XA:A∈I}{XA:A∈I}is a family of nowhere dense subsets of X with  XA⊂XBXA⊂XBwhenever  A⊂BA⊂B, then  ⋃A∈IXA≠X⋃A∈IXA≠X. We give several characterizations and determine the ideals having this property among certain classes like analytic ideals and P-ideals. We also discuss similar covering properties when considering families of compact and meager subsets of X.

Related Topics
Physical Sciences and Engineering Mathematics Analysis
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