Hostname: page-component-8448b6f56d-xtgtn Total loading time: 0 Render date: 2024-04-19T21:03:33.840Z Has data issue: false hasContentIssue false

Connected expansions of topologies

Published online by Cambridge University Press:  17 April 2009

J.A. Guthrie
Affiliation:
Department of Mathematics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA;
D.F. Reynolds
Affiliation:
Department of Mathematics, West Virginia University, Morgantown. West Virginia, USA;
H.E. Stone
Affiliation:
Department of Mathematics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Rights & Permissions [Opens in a new window]

Abstract

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 note presents a characterization of connected simple expansions of topologies in terms of conditions on subspaces, and gives corollaries improving and unifying known sufficient conditions. These results are applied to obtain information about maximally connected spaces, and it is shown that maximal connectedness is inherited by connected subspaces.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1973

References

[1]Anderson, Douglas R., “On connected irresolvable Hausdorff spaces”, Proc. Amer. Math. Soc. 16 (1965), 463466.CrossRefGoogle Scholar
[2]Borges, Carlos J.R., “On extensions of topologies”, Canad. J. Math. 19 (1967), 471487.CrossRefGoogle Scholar
[3]Bourbaki, Nicolas, Elements of mathematics, General topology, Part 1 (Hermann, Paris; Addison-Wesley, Reading, Massachussetts; Palo Alto; London; Don Mills, Ontario; 1966).Google Scholar
[4]Hewitt, Edwin, “A problem of set-theoretic topology”, Duke Math. J. 10 (1943), 309333.CrossRefGoogle Scholar
[5]Kirch, Murray R., “A class of spaces in which compact sets are finite”, Amer. Math. Monthly 76 (1969), 42.CrossRefGoogle Scholar
[6]Levine, Norman, “Simple extensions of topologies”, Amer. Math. Monthly 71 (1964), 2225.CrossRefGoogle Scholar
[7]Thomas, J. Pelham, “Maximal connected topologies”, J. Austral. Math. Soc. 8 (1968), 700705.CrossRefGoogle Scholar