Geodesic
Note on countable unions of Corson countably compact spaces
Commentationes Mathematicae Universitatis Carolinae, Tome 45 (2004) no. 3, pp. 499-507.

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We show that a compact space $K$ has a dense set of $G_\delta$ points if it can be covered by countably many Corson countably compact spaces. If these Corson countably compact spaces may be chosen to be dense in $K$, then $K$ is even Corson.
Classification : 54D30
Keywords: Corson countably compact space; $G_\delta$ point; Corson compact space; Valdivia compact space 
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Kalenda, Ondřej F. K. Note on countable unions of Corson countably compact spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 45 (2004) no. 3, pp. 499-507. http://geodesic.mathdoc.fr/item/CMUC_2004__45_3_a10/