%0 Journal Article %A V. M. Busovikov %A V. Zh. Sakbaev %T Sobolev spaces of functions on a Hilbert space endowed with a translation-invariant measure and approximations of semigroups %J Izvestiya. Mathematics %D 2020 %P 694-721 %V 84 %N 4 %U http://geodesic.mathdoc.fr/item/IM2_2020_84_4_a4/ %G en %F IM2_2020_84_4_a4