2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42406It is shown that we cannot put Majorana neutrinos in the standard Dirac theory without violation of the gauge invariance. Experiments on $ν_l \to l (l = e, μ, τ)$ transitions do not confirm this supposition. It means that on neutrino oscillation experiments, the Majorana neutrino oscillations cannot be observed.LATEX, 4 pages, no figures and tablesHigh Energy Physics - PhenomenologySome Unsettled Questions in the Problem of Neutrino Oscillations. Remarks About the Majorana Neutrino Oscillationstext