Dense families of countable sets below $c$
Logic
2010-03-15 v1 General Topology
Abstract
We show that it is consistent that the continuum is as large as you wish, and for each uncountable cardinal below the continuum, there are a subset of the reals and a family of countable subsets of such that (1) both and have cardinality , (2) for each , (3) for each uncountable subset of contains some elements of , and so (i) there is an almost disjoint family of subsets of the reals with size and chromatic number , (ii) there is a locally compact, locally countable space with cardinality spectrum .
Keywords
Cite
@article{arxiv.1003.2496,
title = {Dense families of countable sets below $c$},
author = {Lajos Soukup},
journal= {arXiv preprint arXiv:1003.2496},
year = {2010}
}