2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49933We study a simple model for which perturbation theory gives ultravioletly divergent results. We show that when the eigen-solution problem of the Hamiltonian of the model is treated nonperturbatively, it is possible for eigenenergies of the Hamiltonian to be finite.6 pages, no figureHigh Energy Physics - Theorytext