2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/109881Asking very elementary relativistic quantum mechanics to meet quantums of area and time, it is possible to observe at a general level: a) the seesaw bound for the mass of neutrinos, and b) the need of a gauge group at energies below Planck mass.10 pages, no figuresGeneral Relativity and Quantum Cosmologytext