Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-26T06:40:32.707Z Has data issue: false hasContentIssue false

Point (Countable) paracompactness

Published online by Cambridge University Press:  09 April 2009

J. M. Boyte
Affiliation:
Appalachian State University, Boone, North Carolina, 28607, U.S.A.
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

This paper introduces two new separation axioms, point paracompactness and point countable paracompactness, both somewhat weaker than regularity, and shows that they can replace regularity in several standard theorems about paracompact or absolutely H-closed or Lindelöf spaces. Thus we obtain sharpened versions of these theorems. We also show that under certain hypotheses the new properties are equivalent to regularity.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1973

References

[1]Alexandrov, P. S. and Urysohn, P., Mémoire sur les espaces topologiques compacts (Verh. Akad. Wetensch. Amsterdam, 14, 1929).Google Scholar
[2]Aull, C. E., ‘A note on countably paracompact spaces and metrization,’ Proc. Amer. Math. Soc. 16 (1965), 13161317.CrossRefGoogle Scholar
[3]James, Dugundji, Topology (Allyn and Bacon, Boston, 1966).Google Scholar
[4]Ernest, Michael, ‘A note on paracompact spaces,’ Proc. Amer. Math. Soc. 4 (1953), 831838.Google Scholar
[5]Ki-iti, Morita, ‘Star-finite coverings and the star-finite propertyMathematica Japonicae, 1 (1948), 66.Google Scholar
[6]Thron, W. J., Topological Structures (Holt, Rinehart and Winston, New York, 1966), p. 144.Google Scholar