2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54586We show within the Wilson renormalization group framework how the flow equation method can be used to prove the perturbative renormalizability of a relativistic massive selfinteracting scalar field. Furthermore we prove the regularity of the renormalized relativistic one-particle irreducible n-point Green functions in the region predicted by axiomatic quantum field theory which ensures that physical renormalization conditions for the two-point function can be imposed.28 pages, LatexHigh Energy Physics - Theorytext