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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Bibliographic Details
Published in:	Topology and its applications Vol. 322; p. 108324
Main Authors:	He, Xi, Zhang, Hang, Zhang, Shuguo
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01.12.2022
Subjects:	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
Online Access:	Get full text
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Summary:	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.
ISSN:	0166-8641
DOI:	10.1016/j.topol.2022.108324