2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/28070This preprint has been withdrawn as crucial errors have been discovered in the papers it has referred to. It is now superseded by cond-mat/9807391.12 pages, 5 figuresMesoscale and Nanoscale PhysicsDisordered Systems and Neural Networkstext