On c-sets and products of ideals

Volume 62 / 1991

Marek Balcerzak Colloquium Mathematicum 62 (1991), 1-6 DOI: 10.4064/cm-62-1-1-6


Let X, Y be uncountable Polish spaces and let μ be a complete σ-finite Borel measure on X. Denote by K and L the families of all meager subsets of X and of all subsets of Y with μ measure zero, respectively. It is shown that the product of the ideals K and L restricted to C-sets of Selivanovskiĭ is σ-saturated, which extends Gavalec's results.


  • Marek Balcerzak

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