Nonmeasurable images
General Topology
2021-12-30 v1
Abstract
In this article we will investigate nonmeasurability with respect to some -ideals in Polish space of images of subsets of by selected mappings defined on the space . Among of them we answer the following question: "It is true that there exists a subset of the unit disc in the real plane such that the continuum many projections onto lines are Lebesgue measurable and continuum many projections are not?". It is known that there exists continuous function such that for every Bernstein set we have We show relative consistency with of fact that the above result is not true for some or -completely nonmeasurable sets, even if we take less than \c many continuous functions.
Cite
@article{arxiv.2112.14629,
title = {Nonmeasurable images},
author = {Aleksander Cieślak and Robert Rałowski},
journal= {arXiv preprint arXiv:2112.14629},
year = {2021}
}