%0 Journal Article %T Journal for the Cultivation of Mathematics. Abstracts %J Czechoslovak Mathematical Journal %D 1960 %P 160-161 %V 10 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1960.100397/ %R 10.21136/CMJ.1960.100397 %G en %F 10_21136_CMJ_1960_100397