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ON GENERALISED METRISABILITY AND CARDINAL INVARIANTS IN QUASITOPOLOGICAL GROUPS

Part of: Generalities Peculiar spaces Connections with other structures, applications Spaces with richer structures Topological and differentiable algebraic systems

Published online by Cambridge University Press:  17 October 2018

ZHONGBAO TANG Open the ORCID record for ZHONGBAO TANG [Opens in a new window]  and
SHOU LIN
ZHONGBAO TANG*
Affiliation:
School of Mathematics and Statistics, Minnan Normal University, Zhangzhou 363000, PR China email tzbao84@163.com
SHOU LIN
Affiliation:
Institute of Mathematics, Ningde Normal University, Ningde 352100, PR China email shoulin60@163.com
*
✉tzbao84@163.com
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Abstract

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We consider generalised metrisability and cardinal invariants in quasitopological groups. We construct examples to show that some equalities of cardinal invariants in topological groups cannot be extended to quasitopological groups.

Keywords

cardinal invariantsemimetrisabletopological groupquasitopological group

MSC classification

Primary: 54A25: Cardinality properties (cardinal functions and inequalities, discrete subsets)
Secondary: 22A05: Structure of general topological groups 54E25: Semimetric spaces 54G20: Counterexamples 54H11: Topological groups
Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 99 , Issue 2 , April 2019 , pp. 302 - 310
Copyright
© 2018 Australian Mathematical Publishing Association Inc. 

Footnotes

Supported by the NSFC (Grant Nos.11471153, 11571158, 11801254).

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