%0 Journal Article %A L. Polkowski %T Some theorems on invariance of infinite dimension under open and closed mappings %J Fundamenta Mathematicae %D 1983 %P 11-34 %V 119 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-119-1-11-34/ %R 10.4064/fm-119-1-11-34 %G en %F 10_4064_fm_119_1_11_34