2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47283In the present paper the two and three point functions which occur at the study of the various physical processes are considered. The investigation has dan in the framework of the perturbative theory at the one loop level. The general and asymptotic expressions for these functions are obtained.11 pages, Latex, no figuresHigh Energy Physics - Phenomenologytext