Amster, PabloMariani, Maria CristinaMendez, Osvaldo2021-07-132021-07-132005-12-08Amster, P., Mariana, M. C., & Méndez, O. (2005). Nonlinear boundary conditions for elliptic equations. <i>Electronic Journal of Differential Equations, 2005</i>(144), pp. 1-8.1072-6691https://hdl.handle.net/10877/13869This work is devoted to the study of the elliptic equation Δu = ƒ(x, u) in a bounded domain Ω ⊂ ℝn with a nonlinear boundary condition. We obtain various existence results applying coincidence degree theory and the method of upper and lower solutions.Text8 pages1 file (.pdf)enAttribution 4.0 InternationalNonlinear elliptic problemsNonlinear boundary conditionsTopological methodsArticle