A note on KC Wallman compactifications

Author:

Hajek Darrell W.,Jiménez Angel E.

Abstract

In a previous paper, D. W. Hajek showed that if a space X X is a T 3 {T_3} space and A A is a compact subset of W X WX , the Wallman compactification of X X , then X A X \cap A is a closed subset of X X . This raises the question of whether this “closed intersection” property characterizes the T 3 {T_3} spaces among the Hausdorff spaces. In the present paper, the authors show this conjecture is false by giving an example of a nonregular Hausdorff space whose Wallman compactification is a KC \operatorname {KC} (compact closed)-space, and, hence, trivially satisfies this “closed intersection” property.

Publisher

American Mathematical Society (AMS)

Subject

Applied Mathematics,General Mathematics

Reference3 articles.

1. A characterization of 𝑇₃-spaces;Hajek, Darrell W.;Indiana Univ. Math. J.,1973

2. Functions with continuous Wallman extensions;Hajek, Darrell W.;Czechoslovak Math. J.,1974

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