Geodesic
On a theorem of Iseki
Glasgow mathematical journal, Tome 11 (1970) no. 2, pp. 110-113

Voir la notice de l'article provenant de la source Cambridge University Press

The purpose of this paper is to generalize a result of K. Iseki [1]. In his note, Iseki proves that, in a normal space S, for every countable discrete collection H = {H1, H2, ...} of sets from S, there exists a countable collection = {U1, U2, ...} of mutually disjoint open sets from S such that Hi ⊂ Ui for every i. 
Kessler, Peter. On a theorem of Iseki. Glasgow mathematical journal, Tome 11 (1970) no. 2, pp. 110-113. doi: 10.1017/S001708950000094X
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[1] 1.Iseki, K., A note on normal spaces, Math. Japon. 3 (1953), 45. Google Scholar

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