Arrieta Algarra, José MaríaJiménez Casas, ÁngelaRodríguez Bernal, Aníbal2023-06-202023-06-20200510.1142/9789812702067_0041https://hdl.handle.net/20.500.14352/50323International Conference on Differential Equations. Hasselt, BELGIUM. JUL 22-26, 2003. Sponsor(s): European Sci Fdn; Nederlandse Org Wetenschappelijk; Fond Wetenschappelijk Onderziek Vlaa bderen; Fond Natl Rech Sci; Math Res Inst; Univ Gent, Simon Stevin Fonds; Wetenschappelijk Onderzoeksgemeens Wisk; MinistCommun Francaise; Thomas Stieltjes Inst Math; Fortis BankWe analyze the limit of solutions of an elliptic problem, with zero flux boundary conditions when the reaction terms are concentrated in a neighborhood of the boundary and that shrinks to the boundary as a parameter goes to zero. We prove that this family of solutions converges, in the sup norm, to the solution of an elliptic problem with no reaction terms and with a nonhomogeneous flux condition. This non zero flux condition for the limiting problem comes from the concentrated reactions around the boundary of the domain.journal articlemetadata only access517.986Funciones (Matemáticas)1202 Análisis y Análisis Funcional