%0 Journal Article %T News and Notices %J Applications of Mathematics %D 1971 %V 16 %N 3 %I mathdoc %U https://geodesic-test.mathdoc.fr/articles/10.21136/AM.1971.103352/ %R 10.21136/AM.1971.103352 %G en %F 10_21136_AM_1971_103352