%0 Journal Article %T Thesis Abstracts %J Canadian mathematical bulletin %D 1970 %P 298-298 %V 13 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500031854/ %R 10.1017/S0008439500031854 %F 10_1017_S0008439500031854