2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49418The neutrino oscillation enhancement in the Earth-type medium mantle - core - mantle is discussed. It is noted that the total conversion is possible both for a resonant matter density and a nonresonant one. A useful parameterization, for the representation of the transition probability for neutrinos and antineutrinos in a single plot, is proposed.13 pages, 5 eps figures includedHigh Energy Physics - Phenomenologytext