Geodesic
On the Novak number of a hyperspace
Commentationes Mathematicae Universitatis Carolinae, Tome 33 (1992) no. 4, pp. 695-698
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An estimate for the Novak number of a hyperspace with the Vietoris topology is given. As a consequence it is shown that this cardinal function can decrease passing from a space to its hyperspace.
An estimate for the Novak number of a hyperspace with the Vietoris topology is given. As a consequence it is shown that this cardinal function can decrease passing from a space to its hyperspace.
Classification : 54A25, 54A35, 54B20
Keywords: hyperspace; Vietoris topology; Novak number; netweight 
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Bella, Angelo; Costantini, Camillo. On the Novak number of a hyperspace. Commentationes Mathematicae Universitatis Carolinae, Tome 33 (1992) no. 4, pp. 695-698. http://geodesic.mathdoc.fr/item/CMUC_1992_33_4_a14/

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