Geodesic
On non-normality points and metrizable crowded spaces
Commentationes Mathematicae Universitatis Carolinae, Tome 48 (2007) no. 3, pp. 523-527.

Voir la notice de l'article provenant de la source Czech Digital Mathematics Library

$\beta X-\{p\}$ is non-normal for any metrizable crowded space $X$ and an arbitrary point $p\in X^{*}$.
Classification : 54D35
Keywords: nice family; $p$-filter; $p$-ultrafilter; projection; non-normality point; butterfly-point 
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Logunov, Sergei. On non-normality points and metrizable crowded spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 48 (2007) no. 3, pp. 523-527. http://geodesic.mathdoc.fr/item/CMUC_2007__48_3_a10/