| Title:
|
Combinatorics of ideals --- selectivity versus density (English) |
| Author:
|
Kwela, A. |
| Author:
|
Zakrzewski, P. |
| Language:
|
English |
| Journal:
|
Commentationes Mathematicae Universitatis Carolinae |
| ISSN:
|
0010-2628 (print) |
| ISSN:
|
1213-7243 (online) |
| Volume:
|
58 |
| Issue:
|
2 |
| Year:
|
2017 |
| Pages:
|
261-266 |
| Summary lang:
|
English |
| . |
| Category:
|
math |
| . |
| Summary:
|
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. (English) |
| Keyword:
|
ideals on natural numbers |
| Keyword:
|
ultrafilter topology |
| MSC:
|
03E05 |
| MSC:
|
03E15 |
| MSC:
|
54H05 |
| idZBL:
|
Zbl 06773718 |
| idMR:
|
MR3666945 |
| DOI:
|
10.14712/1213-7243.2015.203 |
| . |
| Date available:
|
2017-06-13T13:24:41Z |
| Last updated:
|
2020-01-05 |
| Stable URL:
|
http://hdl.handle.net/10338.dmlcz/146792 |
| . |
| Reference:
|
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| Reference:
|
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| Reference:
|
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| Reference:
|
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| Reference:
|
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| Reference:
|
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| Reference:
|
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| Reference:
|
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| Reference:
|
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| Reference:
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| . |
