%0 Journal Article %A Alan Taylor %T On saturated sets of ideals and Ulam's problem %J Fundamenta Mathematicae %D 1980 %P 37-53 %V 109 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-109-1-37-53/ %R 10.4064/fm-109-1-37-53 %G en %F 10_4064_fm_109_1_37_53