%0 Journal Article %A M. A. Baidak %A M. Sh. Braverman %A Yu. I. Petunin %T Additivity of the variance is a characteristic property of the Hilbert space $L_2(\Omega,A,\mu)$ %J Funkcionalʹnyj analiz i ego priloženiâ %D 1983 %P 66-68 %V 17 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1983_17_3_a9/ %G ru %F FAA_1983_17_3_a9