Abstract

An antisymmetric wave function approximation for a system of electrons consisting of loosely-coupled electron groups is presented. The group functions are antisymmetric, normalized, and orthogonal in the strong sense, and it is implied that they are localized to perpendicular subspaces. The ground-state energy lies below that obtained by the Hartree-Fock method and may be close to the exact non-relativistic ground-state energy if the elecdifferent regions of space. (L.N.N.)

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