Geodesic
Characterization of $\sigma $-porosity via an infinite game
Martin Doležal1
1 Department of Mathematical Analysis Faculty of Mathematics and Physics Charles University Sokolovská 83 186 75 Praha 8, Czech Republic
Fundamenta Mathematicae, Tome 216 (2012) no. 2, pp. 109-118.

Voir la notice de l'article provenant de la source Institute of Mathematics Polish Academy of Sciences

Let $X$ be an arbitrary metric space and $P$ be a porosity-like relation on $X$. We describe an infinite game which gives a characterization of $\sigma $-$P$-porous sets in $X$. This characterization can be applied to ordinary porosity above all but also to many other variants of porosity.
DOI : 10.4064/fm216-2-2
Keywords: arbitrary metric space porosity like relation nbsp describe infinite game which gives characterization sigma p porous sets nbsp characterization applied ordinary porosity above many other variants porosity

Martin Doležal 1

1 Department of Mathematical Analysis Faculty of Mathematics and Physics Charles University Sokolovská 83 186 75 Praha 8, Czech Republic 
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Martin Doležal. Characterization of $\sigma $-porosity via an infinite game. Fundamenta Mathematicae, Tome 216 (2012) no. 2, pp. 109-118. doi : 10.4064/fm216-2-2. http://geodesic.mathdoc.fr/articles/10.4064/fm216-2-2/

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