Depth^+ and Length^+ of Boolean algebras
Rings and Algebras
2020-01-01 v3 Logic
Abstract
Let inv denote the cardinal invariants Depth^+ and Length^+ on Boolean algebras. For many singular cardinals we create a strict inequality between the product of the inv values and the inv of the product algebra. The proof holds in ZFC.
Keywords
Cite
@article{arxiv.1303.3704,
title = {Depth^+ and Length^+ of Boolean algebras},
author = {Shimon Garti and Saharon Shelah},
journal= {arXiv preprint arXiv:1303.3704},
year = {2020}
}
Comments
11 pages, accepted version after minor changes