2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71666We prove an effective bound for the degree of a smooth divisor of a hypersurface of P^n, n>4 (projective space over an algebraically closed field of characteristic zero). Our result follows from a strong (since the degree of the divisor is not involved) generalization of the "Speciality theorem" of Gruson-Peskine, which we prove to hold for any smooth, subcanonical, codimension two, projective verieties of dimension at least three.Algebraic Geometry14M06, 14M10, 14N05text