ACTA MATHEMATICA UNIVERSITATIS COMENIANAE

Vol. 62,   1   (1993)
pp.   109-115
ON MARCZEWSKI SETS AND SOME IDEALS
M. BALCERZAK

Abstract.  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.

AMS subject classification. 
Keywords.  Perfect set, $(s^0)$ set, ideal
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