Geodesic
ON MARCZEWSKI SETS AND SOME IDEALS
Acta mathematica Universitatis Comenianae, Tome 62 (1993) no. 1 
M. Balcerzak. ON MARCZEWSKI SETS AND SOME IDEALS. Acta mathematica Universitatis Comenianae, Tome 62 (1993) no. 1. http://geodesic.mathdoc.fr/item/AMUC_1993_62_1_a5/
@article{AMUC_1993_62_1_a5,
     author = {M. Balcerzak},
     title = {ON {MARCZEWSKI} {SETS} {AND} {SOME} {IDEALS}},
     journal = {Acta mathematica Universitatis Comenianae},
     year = {1993},
     volume = {62},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/AMUC_1993_62_1_a5/}
}
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Voir la notice de l'article provenant de la source Comenius University

Using the methods of Brown and Walsh, we get condition guaranteeing that, for an ideal $\ci$ of sets in a perfect Polish space some $(s^0)$ sets are not in $\ci$. A few examples and corollaries are given.