2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/33736Based on principles of the Expansive Nondecelerative Universe model that enables to quantify and localize the gravitational energy density, and stemming from the see-saw mechanism, the mass of electron, muon and tau neutrinos are determined in an independent way.3 pages, LaTeXGeneral Relativity and Quantum Cosmologytext