# Sh:1038

• Shelah, S., & Spinas, O. (2015). Mad spectra. J. Symb. Log., 80(3), 901–916.
• 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 \mathcal 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({\mathcal A}) and max({\mathcal A}).
• Version 2015-01-29_11 (18p) published version (16p)
Bib entry
@article{Sh:1038,
author = {Shelah, Saharon and Spinas, Otmar},
}