2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36243Maxwell electrodynamics, considered as a source of the classical Einstein field equations, leads to the singular isotropic Friedmann solutions. We show that this singular behavior does not occur for a class of nonlinear generalizations of the electromagnetic theory. A mathematical toy model is proposed for which the analytical nonsingular extension of FRW solutions is obtained.5 pages, 3 eps figures, REVTeX 3 with epsf and multicol sty files, new solutions, improved version with emphasis in math content Journal-refby: Phys. Rev. D 65, 063501 (2002)General Relativity and Quantum Cosmologytext