Combinatorics of ideals - selectivity versus density
Adam Kwela , Piotr Zakrzewski
AbstractThis note is devoted to combinatorial properties of ideals on the set of natural numbers. By a result of Mathias, two such properties, selectivity and density, in the case of definable ideals, exclude each other. The purpose of this note is to measure the "distance" between them with the help of ultrafilter topologies of Louveau.
|Journal series||Commentationes Mathematicae Universitatis Carolinae, ISSN 0010-2628, e-ISSN 1213-7243|
|Publication size in sheets||0|
|Keywords in English||ideals on natural numbers, ultrafilter topology|
|Score|| = 0.0, 15-12-2017, ArticleFromJournal|
= 5.0, 15-12-2017, ArticleFromJournal - czasopismo zagraniczne spoza list
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