%0 Journal Article %T Abstracts of Theses %J Canadian mathematical bulletin %D 1967 %P 491-492 %V 10 %N 3 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500028435/ %R 10.1017/S0008439500028435 %F 10_1017_S0008439500028435