Several amazing discoveries about compact metrizable spaces in ZF
General Topology
2020-08-05 v1
Abstract
In the absence of the axiom of choice, the set-theoretic status of many natural statements about metrizable compact spaces is investigated. Some of the statements are provable in , some are shown to be independent of . For independence results, distinct models of and permutation models of with transfer theorems of Pincus are applied. New symmetric models are constructed in each of which the power set of is well-orderable, the Continuum Hypothesis is satisfied but a denumerable family of non-empty finite sets can fail to have a choice function, and a compact metrizable space need not be embeddable into the Tychonoff cube .
Keywords
Cite
@article{arxiv.2008.01233,
title = {Several amazing discoveries about compact metrizable spaces in ZF},
author = {Kyriakos Keremedis and Eleftherios Tachtsis and Eliza Wajch},
journal= {arXiv preprint arXiv:2008.01233},
year = {2020}
}