2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/181456We show how every bound state of a finite system of identical fermions, whether a ground state or an excited one, defines a density functional. Degeneracies created by a symmetry group can be trivially lifted by a pseudo-Zeeman effect. When complex scaling can be used to regularize a resonance into a square integrable state, a DF also exists.4 pages, no figuresOther Condensed MatterStrongly Correlated ElectronsMathematical PhysicsNuclear Theorytext