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A Strengthened topological cardinal inequality

Published:1985-12 Issue:3 Volume:32 Page:375-378
ISSN:0004-9727
Container-title:Bulletin of the Australian Mathematical Society
language:en
Short-container-title:Bull. Austral. Math. Soc.

Author:

Shu-Hao Sun,Yan-Ming Wang

Abstract

A new cardinal inequality, |K (X)| ≤ 2L∗(X) · psw (X), is proved in this paper. It strengthens the result of D.K. burke and R. Hodel the |K (X)| ≤ 2e (X) · psw (X).

Publisher

Cambridge University Press (CUP)

Subject

General Mathematics

Reference5 articles.

1. A topological space cardinal inequality involving the *Lindelöf number;MuMing;Acta Mathematica Sinica,1983

2. The number of compact subsets of a topological space

3. [3] Burke D.K. , A note on R.H. Bing's example G, in TopologyConference Virginia Polytechnic Institute and State University,March (1973) (Lecture Notes in Mathematics 375 Springer-Verlag 1974), 47–52.

Cited by 3 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. The establishment and development of star-Lindelöf spaces;Topology and its Applications;2020-09

2. How weak is weak extent?;Topology and its Applications;2002-04

3. Combinatorial set theory and cardinal function inequalities;Proceedings of the American Mathematical Society;1991

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