Geodesic
On closures of countable subsets of $BN$
Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki, no. 3 (2011), pp. 15-20 Cet article a éte moissonné depuis la source Math-Net.Ru

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We consider a compactification $BN$ of a countable discrete space $N$. The paper describes some properties of the closures of subsets of $BN$, which consist of points belonging to different classes. We prove the existence of points which do not belong to the classes obtained before.
Mots-clés : compactification
Keywords: Stone–Chech compactification, Stone space of Boolean algebra, centered system of sets. 
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E. S. Bastrykov. On closures of countable subsets of $BN$. Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki, no. 3 (2011), pp. 15-20. http://geodesic.mathdoc.fr/item/VUU_2011_3_a1/

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