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JOURNALS // Journal of the Belarusian State University. Mathematics and Informatics // Archive

Journal of the Belarusian State University. Mathematics and Informatics, 2021 Volume 1, Pages 46–53 (Mi bgumi32)

This article is cited in 2 papers

Geometry and Topology

On the countably-compactifiability in the sense of Morita

V. L. Timokhovich, H. O. Kukrak

Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

Abstract: We consider an extension $Y$ of a topological space $X$ that is canonically embedded in the Wallman extension $\omega X$, in which any countably compact set closed in $X$ is closed and such that any infinite set contained in $X$ has a limit point in it. This extension is called saturation of the space $X$. We find a necessary and sufficient condition for the countable compactness of the space $Y$. Thus the problem of existence of countably-compactification in the sense of Morita of certain type is solved.

Keywords: countably-compactification in the sense of Morita; Wallman compactification; saturation of topological space.

UDC: 515.12

DOI: 10.33581/2520-6508-2021-1-46-53



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