Mad Spectra
Logic
2014-02-25 v1
Abstract
The mad spectrum is the set of all cardinalities of infinite maximal almost disjoint families on omega. We treat the problem to characterize those sets A which, in some forcing extension of the universe, can be the mad spectrum. We solve this problem to some extent. What remains open is the possible values of min(A) and max(A).
Cite
@article{arxiv.1402.5616,
title = {Mad Spectra},
author = {Saharon Shelah and Otmar Spinas},
journal= {arXiv preprint arXiv:1402.5616},
year = {2014}
}