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/