Classifying invariant $\sigma$-ideals with analytic base on good Cantor measure spaces
General Topology
2016-02-19 v1 Dynamical Systems
Logic
Abstract
Let be a zero-dimensional compact metrizable space endowed with a strictly positive continuous Borel -additive measure which is good in the sense that for any clopen subsets with there is a clopen set with . We study -ideals with Borel base on which are invariant under the action of the group of measure-preserving homeomorphisms of , and show that any such -ideal is equal to one of seven -ideals: , , , , , , or . Here is the ideal consisting of subsets of cardiality in , is the ideal of meager subsets of , is the ideal of null subsets of , and is the -ideal generated by closed null subsets of .
Cite
@article{arxiv.1409.3922,
title = {Classifying invariant $\sigma$-ideals with analytic base on good Cantor measure spaces},
author = {Taras Banakh and Robert Ralowski and Szymon Zeberski},
journal= {arXiv preprint arXiv:1409.3922},
year = {2016}
}
Comments
10 pages