On some relations between properties of invariant $\sigma$-ideals in Polish spaces
General Topology
2019-07-23 v1
Abstract
In this paper we shall consider a couple of properties of -ideals and study relations between them. Namely we will prove that -cc -ideals are tall and that the Weaker Smital Property implies that every Borel -positive set contains a witness for non() as well, as satisfying ccc and Fubini Property. We give also a characterization of nonmeasurability of -Luzin sets and prove that the ideal does not posses the Fubini Property using some interesting lemma about perfect sets.
Cite
@article{arxiv.1907.09306,
title = {On some relations between properties of invariant $\sigma$-ideals in Polish spaces},
author = {Marcin Michalski},
journal= {arXiv preprint arXiv:1907.09306},
year = {2019}
}
Comments
Conference paper: $14^{th}$ Students' Science Conference (2016), Wroc{\l}aw, Poland