CCS-normal and B-normal spaces

A space [Formula: see text] is called [Formula: see text]-normal (respectively, [Formula: see text]-normal) if there exist a normal space [Formula: see text] and a bijection [Formula: see text] such that [Formula: see text] is a homeomorphism for any cellular-compact (resp. [Formula: see text]-bounded) subset [Formula: see text] of [Formula: see text]. We investigate the relationship between [Formula: see text]-normal space and [Formula: see text]-normal space and also study the basic topological properties of [Formula: see text]-normal and [Formula: see text]-normal space. In the course of this study, we prove the submetrizable spaces are [Formula: see text]-normal which answers affirmatively, a question raised earlier, and yields a very simple proof of the fact [Formula: see text]-space and Niemytzki plane are [Formula: see text]-normal, proved quite painstakingly in Applied General Topology, Vol 21, No. 1 (2020). A large class of spaces that are [Formula: see text]-normal is given here.

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Publication Details

Journal
Asian-European Journal of Mathematics
Published
2025-07-18
DOI
https://doi.org/10.1142/s1793557125500846
Primary Topic
Fuzzy and Soft Set Theory
Type
article
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article

CCS-normal and B-normal spaces

Asit Baran Raha, Sagarmoy Bag, Ram Chandra Manna
Asian-European Journal of Mathematics
Fuzzy and Soft Set Theory
article

CCS-normal and B-normal spaces

Asit Baran Raha, Sagarmoy Bag, Ram Chandra Manna
article en

Abstract

A space [Formula: see text] is called [Formula: see text]-normal (respectively, [Formula: see text]-normal) if there exist a normal space [Formula: see text] and a bijection [Formula: see text] such that [Formula: see text] is a homeomorphism for any cellular-compact (resp. [Formula: see text]-bounded) subset [Formula: see text] of [Formula: see text]. We investigate the relationship between [Formula: see text]-normal space and [Formula: see text]-normal space and also study the basic topological properties of [Formula: see text]-normal and [Formula: see text]-normal space. In the course of this study, we prove the submetrizable spaces are [Formula: see text]-normal which answers affirmatively, a question raised earlier, and yields a very simple proof of the fact [Formula: see text]-space and Niemytzki plane are [Formula: see text]-normal, proved quite painstakingly in Applied General Topology, Vol 21, No. 1 (2020). A large class of spaces that are [Formula: see text]-normal is given here.

Asian-European Journal of MathematicsVol. 19(01)
Institute for Development and Research in Banking Technology (IN), Education & Research Foundation (US), Indian Statistical Institute (IN)
Openalex Percentile: Top 76%
Fuzzy and Soft Set Theory
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