More on ideal limit points

In this paper we continue the study of ideal limit points. We introduce a new combinatorial property of ideals called weakly P+, and investigate the relation between P+, weakly P+ and the complexity of ideal limit points. Moreover, we clarify the relation between ideal limit points, ideal cluster po...

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Veröffentlicht in:Topology and its applications Jg. 322; S. 108324
Hauptverfasser: He, Xi, Zhang, Hang, Zhang, Shuguo
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier B.V 01.12.2022
Schlagworte:
formula omitted
Ideal cluster points
Ideal limit points
Weakly [formula omitted]
secondary
P
Ideal cluster points
Ideal limit points
Weakly P
primary
ISSN:0166-8641
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Abstract In this paper we continue the study of ideal limit points. We introduce a new combinatorial property of ideals called weakly P+, and investigate the relation between P+, weakly P+ and the complexity of ideal limit points. Moreover, we clarify the relation between ideal limit points, ideal cluster points and ordinary ideal limit points. Finally, we investigate the projective hierarchy of ideal limit points.
AbstractList In this paper we continue the study of ideal limit points. We introduce a new combinatorial property of ideals called weakly P+, and investigate the relation between P+, weakly P+ and the complexity of ideal limit points. Moreover, we clarify the relation between ideal limit points, ideal cluster points and ordinary ideal limit points. Finally, we investigate the projective hierarchy of ideal limit points.
ArticleNumber 108324
Author Zhang, Shuguo
He, Xi
Zhang, Hang
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Cites_doi 10.1016/j.topol.2018.11.022
10.1016/j.topol.2022.108061
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Keywords secondary
P
Ideal cluster points
Ideal limit points
Weakly P
primary
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Ideal cluster points
Ideal limit points
Weakly [formula omitted]
Title More on ideal limit points
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