2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/228424We obtain a quantitative version of the classical Chevalley-Weil theorem for curves. Let $ϕ: \tilde{C} \to C$ be an unramified morphism of non-singular plane projective curves defined over a number field $K$. We calculate an effective upper bound for the norm of the relative discriminant of the number field $K(Q)$ over $K$ for any point $P\in C(K)$ and $Q\inϕ^{-1}(P)$Algebraic GeometryNumber Theory14G25, 14H25, 14G05, 11G30text