2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/174272A hyperbolic problem wich combines a classical(Dirichlet) and a non-local contraint is considered.The existence and uniqueness of strong solutions are proved,we use a functionnal analysis method based on a priori estimate and on the density of the range of the operator generated by the considered problem.Travail publiable, 14 pagesFunctional AnalysisAnalysis of PDEs35L82text