2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/173679In this paper I cite p.p. 100-117 of book G. Quznetsov, Probabilistic Treatment of Gauge Theories, in series Contemporary Fundamental Physics,ed. V. Dvoeglazov, Nova Sci. Publ., NY (2007). There I research a bound between neutrino and it's lepton.LaTex, 18 pages, no figuresGeneral Physicstext