Back to Search Start Over

On cellular-compact spaces.

Authors :
Juhász, I.
Soukup, L.
Szentmiklóssy, Z.
Source :
Acta Mathematica Hungarica. Dec2020, Vol. 162 Issue 2, p549-556. 8p.
Publication Year :
2020

Abstract

As it was introduced by Tkachuk and Wilson in [7], a topological space X is cellular-compact if for any cellular, i.e. disjoint, family U of non-empty open subsets of X there is a compact subspace K ⊂ X such that K ∩ U ≠ ∅ for each U ∈ U . In this note we answer several questions raised in [7] by showing that any first countable cellular-compact T2-space is T3, and so its cardinality is at most c = 2 ω ; cov (M) > ω 1 implies that every first countable and separable cellular-compactT2-space is compact; if there is no S-space then any cellular-compact T3-space of countable spread is compact; M A ω 1 implies that every point of a compact T2-space of countable spread has a disjoint local π -base. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02365294
Volume :
162
Issue :
2
Database :
Academic Search Index
Journal :
Acta Mathematica Hungarica
Publication Type :
Academic Journal
Accession number :
146931331
Full Text :
https://doi.org/10.1007/s10474-020-01035-4