%0 Journal Article %T Openings in Mathematics %J Canadian mathematical bulletin %D 1959 %P 147-147 %V 2 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500025224/ %R 10.1017/S0008439500025224 %F 10_1017_S0008439500025224