%0 Journal Article %A Ronald Freiwald %T Images of Borel sets and k-analytic sets %J Fundamenta Mathematicae %D 1972 %P 35-46 %V 75 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-75-1-35-46/ %R 10.4064/fm-75-1-35-46 %G en %F 10_4064_fm_75_1_35_46