2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/201843If a central vector potential V(r,a) in the Dirac equation is monotone in a parameter 'a', then a discrete eigenvalue E(a) is monotone in 'a'. For such a special class of comparisons, this generalizes an earlier comparison theorem that was restricted to node free states. Moreover, the present theorem applies to every discrete eigenvalue.3 pagesMathematical PhysicsHigh Energy Physics - Theorytext