2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/30045It is argued that the Thouless number g(L) is not the only parameter relevant in scale transformations, and that the second parameter connected with off-diagonal disorder should be introduced. A two-parameter scaling theory is suggested that explains a phenomenon of the upper critical dimension from the viewpoint of scaling ideas.Latex, 8 pages, 2 figuresDisordered Systems and Neural Networkstext