2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41915Neutrino mixing and basics of neutrino oscillations are considered. Recent evidences in favour of neutrino oscillations, obtained in the solar and atmospheric neutrino experiments, are discussed. Neutrino oscillations in the solar and atmospheric ranges of $Δm^{2}$ are considered in the framework of the minimal scheme with the mixing of three massive neutrinos.Report at the International School of Physics ``Enrico Fermi'', Varenna, August 2002High Energy Physics - Phenomenologytext