2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56471We construct a pair potential which in a scaling limit leads to a Hamiltonian that generates co-existing mean-field and superconducting phases. Depending on the relative values of the coupling constants, the superconducting phase may exist at arbitrarily high temperatures.7 pages, LaTeXMathematical PhysicsSuperconductivityHigh Energy Physics - Theory81T05, 82B10, 82B23text