%0 Journal Article
%T Openings in Mathematics
%J Canadian mathematical bulletin
%D 1963
%P 158-158
%V 6
%N 1
%U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500026503/
%R 10.1017/S0008439500026503
%F 10_1017_S0008439500026503