%0 Journal Article %A Leszek Pacholski %T Introduction %J Fundamenta Mathematicae %D 2000 %V 166 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-166-1-2-0/ %R 10.4064/fm-166-1-2-0 %G fr %F 10_4064_fm_166_1_2_0