2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44352Three topics are discussed : 1 Base fermions and scalars in SO10, 2 Neutrino 'mass from mixing' in vacuo and in matter, 3 Some perspectives .22 pages, 6 figures, Contribution to XI International Workshop "Neutrino Telescopes in Venice", 22.-25. February 2005, Venice, Italy, corrected version, to appear in the proceedingsHigh Energy Physics - Phenomenologytext