  The lepton mass ratios are calculated using a geometric unified theory,
taking the leptons as the only three possible families of topological
excitations of the electron or the neutrino. The theoretical results give
107.5916 Mev for the muon mass and 1770.3 Mev for the tau mass using the mass
ratios. Using the additional geometric interaction energy in a muon-neutrino
system, the main leptonic mass contribution to the pion and kaon mass is
calculated to be, respectively, 140.88 Mev and 494.76 Mev. The necessary first
order corrections, due to the interaction of the excitations, should be of the
order of the discrepancies with experimental values. The three geometric
families of leptonic excitations may be related to a quark structure.
