We deal with two cardinal invariants and give conditions on their equality using Shelah's pcf theory.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-fm167-1-2,
author = {Ofer Shafir},
title = {Two cases when $d\_{$\kappa$}$ and $d*\_{$\kappa$}$ are equal},
journal = {Fundamenta Mathematicae},
volume = {167},
year = {2001},
pages = {17-21},
zbl = {0969.03054},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm167-1-2}
}
Ofer Shafir. Two cases when $d_{κ}$ and $d*_{κ}$ are equal. Fundamenta Mathematicae, Tome 167 (2001) pp. 17-21. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm167-1-2/