Combinatorics of ideals --- selectivity versus density
Commentationes Mathematicae Universitatis Carolinae (2017)
- Volume: 58, Issue: 2, page 261-266
- ISSN: 0010-2628
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topKwela, A., and Zakrzewski, P.. "Combinatorics of ideals --- selectivity versus density." Commentationes Mathematicae Universitatis Carolinae 58.2 (2017): 261-266. <http://eudml.org/doc/288180>.
@article{Kwela2017,
abstract = {This 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.},
author = {Kwela, A., Zakrzewski, P.},
journal = {Commentationes Mathematicae Universitatis Carolinae},
keywords = {ideals on natural numbers; ultrafilter topology},
language = {eng},
number = {2},
pages = {261-266},
publisher = {Charles University in Prague, Faculty of Mathematics and Physics},
title = {Combinatorics of ideals --- selectivity versus density},
url = {http://eudml.org/doc/288180},
volume = {58},
year = {2017},
}
TY - JOUR
AU - Kwela, A.
AU - Zakrzewski, P.
TI - Combinatorics of ideals --- selectivity versus density
JO - Commentationes Mathematicae Universitatis Carolinae
PY - 2017
PB - Charles University in Prague, Faculty of Mathematics and Physics
VL - 58
IS - 2
SP - 261
EP - 266
AB - This 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.
LA - eng
KW - ideals on natural numbers; ultrafilter topology
UR - http://eudml.org/doc/288180
ER -
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