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Article

Zakrzewski, Piotr
A characterization of the meager ideal. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 56 (2015), issue 1, pp. 45-50
MSC: 03E15, 54H05 | MR 3311576 | Zbl 06433804 | DOI: 10.14712/1213-7243.015.104
Keywords:
Polish group; $\sigma $-ideal; meager sets
Summary:
We give a classical proof of the theorem stating that the $\sigma $-ideal of meager sets is the unique $\sigma $-ideal on a Polish group, generated by closed sets which is invariant under translations and ergodic.
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