2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/69457By decision of the first author, the paper will no longer be available.Paper withdrawn on Oct. 26th, 2004Classical Analysis and ODEsFunctional Analysis58E10, 58J55, 53D12, 34K18, 47A53A bifurcation result for semi-Riemannian trajectories of the Lorentz force equationtext