2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/25066An exchange energy functional is proposed and tested for obtaining a class of excited-state energies using density-functional formalism. The functional is the excited-state counterpart of the local-density approximation functional for the ground-state. It takes care of the state-dependence of the energy functional and leads to highly accurate excitation energies.19 pages. 2 figures. Submitted to PRAOther Condensed Mattertext