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zbMATH Open
Article . 2021
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Selectively strongly star-Menger spaces and related properties

Authors: Bonanzinga M.; Maesano F.;

Selectively strongly star-Menger spaces and related properties

Abstract

Summary: A space \(X\) is selectively strongly star-Menger (briefly, selSSM) if for each sequence \((\mathscr{U}_n : n \in\mathbb{N})\) of open covers of \(X\) and each sequence \((D_n : n \in\mathbb{N})\) of dense subspaces of \(X\), there exists a sequence \((F_n : n \in\mathbb{N})\) of finite subsets \(F_n \subset D_n\), \(n\in\mathbb{N}\), such that \(\{st (F_n, \mathscr{U}_n) : n \in\mathbb{N}\}\) is an open cover of \(X\). This property is between absolute countable compactness [\textit{M. V. Matveev}, Topology Appl. 58, No. 1, 81--92 (1994; Zbl 0801.54021)] and selective absolute star-Lindelöfness [\textit{M. Bonanzinga} et al., Topology Appl. 221, 517--523 (2017; Zbl 1376.54024)] and represents a ``selective version'' of the selection principle strongly star Menger [\textit{L. D. Kočinac}, Publ. Math. Debr. 55, No. 3--4, 421--431 (1999; Zbl 0932.54022)]. In this paper, we study some properties of selectively strongly star-Menger spaces, the relation with related properties and give some example distinguishing the properties considered.

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Italy
Related Organizations
Keywords

Q1-390, Science (General), Compactness, Noncompact covering properties (paracompact, Lindelöf, etc.), strongly star-Menger, Special maps on topological spaces (open, closed, perfect, etc.), Absolute countable compactness, absolute star-Lindelöfness, strongly star-Menger, selective absolute star-Lindelöfness, selection principles, absolute star-Lindelöfness, absolute countable compactness, selection principles, Product spaces in general topology, selective absolute star-Lindelöfness

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
Green
Published in a Diamond OA journal