2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/118985Arguments are provided which show that extension of renormalizability in quantum field theory is possible. A dressed scheme for the perturbation expansion is proposed. It is proven that in this scheme a nonrenormalizable interaction becomes renormalizable in the restrictive sense, i.e. its ultraviolet divergences can be cancelled by a finite number of counterterms included in the Lagrangian. As an illustration, the renormalization of the $π$-nucleon pseudovector interaction is discussed in some detail.9 pages, 3 figuresHigh Energy Physics - Phenomenologytext