We present a simple proof of a theorem that yields as a corollary a result of Valdivia that sharpens an old result of Johnson and Rosenthal.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-sm213-2-5, author = {Jorge Mujica}, title = {Quotients with a shrinking basis}, journal = {Studia Mathematica}, volume = {209}, year = {2012}, pages = {189-190}, zbl = {1274.46032}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm213-2-5} }
Jorge Mujica. Quotients with a shrinking basis. Studia Mathematica, Tome 209 (2012) pp. 189-190. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm213-2-5/