Density functional methods were developed, in which the Coulomb
electron-electron interaction is split into a long- and a short-range part. In
such methods, one term is calculated using traditional density functional
approximations, like the local density approximation. The present paper tries
to shed some light upon the best way to do it by comparing the accuracy of the
local density approximation with accurate results for the He atom.Comment: 4 pages, 2 figures, to appear in J. Mol. Struct. (Theochem
