%0 Journal Article %T Summer Seminar University of British Columbia June 24 - August 16, 1963 %J Canadian mathematical bulletin %D 1963 %P 149-149 %V 6 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500026448/ %R 10.1017/S0008439500026448 %F 10_1017_S0008439500026448