%0 Journal Article %A Harvey M. Friedman %T Borel and Baire reducibility %J Fundamenta Mathematicae %D 2000 %P 61-69 %V 164 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-164-1-61-69/ %R 10.4064/fm-164-1-61-69 %G en %F 10_4064_fm_164_1_61_69