2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/99185An effective action approach to Kohn-Sham density functional theory is used to illustrate how the exact Green's function can be calculated in terms of the Kohn-Sham Green's function. An example based on Skyrme energy functionals shows that single-particle Kohn-Sham spectra can be improved by adding sources used to construct the energy functional.9 pages, 3 figuresNuclear TheoryStrongly Correlated ElectronsHigh Energy Physics - Phenomenologytext