We give a uniform proof that holds for every regular cardinal λ.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-fm220-2-2,
author = {Assaf Rinot and Stevo Todorcevic},
title = {Rectangular square-bracket operation for successor of regular cardinals},
journal = {Fundamenta Mathematicae},
volume = {220},
year = {2013},
pages = {119-128},
zbl = {1284.03220},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm220-2-2}
}
Assaf Rinot; Stevo Todorcevic. Rectangular square-bracket operation for successor of regular cardinals. Fundamenta Mathematicae, Tome 220 (2013) pp. 119-128. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm220-2-2/