2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47453We describe a fit to the charged fermion mass hierarchy using the chiral quantum numbers of the maximal anti-grand unification group $SMG^3 \times U(1)_f$, where $SMG \equiv SU(3) \times SU(2) \times U(1)$. This fit suggests a set of Higgs fields responsible for the breakdown, near the Planck scale, of $SMG^3 \times U(1)_f$ to the Standard Model group.4 page LaTeX file; to appear in the Proceedings of the IVth International Workshop on Progress in Heavy Quark Physics, Rostock, 20-22 September 1997High Energy Physics - Phenomenologytext