Geodesic
Remarks on $\mathcal{S}$-Closedness in Topological Spaces
Bollettino della Unione matematica italiana, Série 8, 10B (2007) no. 2, pp. 469-483.

Voir la notice de l'article provenant de la source Biblioteca Digitale Italiana di Matematica

Corresponding to [27], some properties of S-closed subspaces and subsets $\mathcal{S}$-closed relative to a topological space are proved. Conditions under which mappings preserve certain $\mathcal{S}$-closed subspaces are investigated.
Relativamente al [27], sono provate alcune proprieta dei sottoinsiemi $\mathcal{S}$-chiusi di uno spazio topologico. Sono studiate delle condizioni mediante le quali le applicazioni conservano alcuni sottospazi $\mathcal{S}$-chiusi. 
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Duszyński, Zbigniew. Remarks on $\mathcal{S}$-Closedness in Topological Spaces. Bollettino della Unione matematica italiana, Série 8, 10B (2007) no. 2, pp. 469-483. http://geodesic.mathdoc.fr/item/BUMI_2007_8_10B_2_a14/

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