2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/120548The neutrino mixing matrix has been measured to be of a form consistent with tribimaximal mixing, while the quark mixing matrix is almost diagonal. A scheme based on flavour A_4 symmetry for understanding these patterns simultaneously is presented.4 pages. Invited talk at ICHEP 2006. To appear in the proceedingsHigh Energy Physics - Phenomenologytext