Geodesic
Topologies related to (x^α)-porosity
Acta Universitatis Lodziensis. Folia Mathematica, Tome 05 (1992).

Voir la notice de l'article provenant de la source University of Lodz Repository

L. Zajiček, using the notion of porosity, defined superporosity, the porosity topology and the *-porosity topology. In our paper we introduce the equivalents of these notions which we get by replacing porosity with (x^α)-porosity and (x^α, c)-porosity. We examine relationships among the notions which we define in such a way for different α and c. 
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     author = {Filipczak, Tomasz},
     title = {Topologies related to (x^\ensuremath{\alpha})-porosity},
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Filipczak, Tomasz. Topologies related to (x^α)-porosity. Acta Universitatis Lodziensis. Folia Mathematica, Tome 05 (1992). http://geodesic.mathdoc.fr/item/AULFM_1992_05_a9/