Dallos Santos, Dionicio Pastor2022-03-222022-03-222017-01-30Dallos Santos, D. P. (2017). Existence of solutions to nonlinear problems with three-point boundary conditions. <i>Electronic Journal of Differential Equations, 2017</i>(35), pp. 1-10.1072-6691https://hdl.handle.net/10877/15540Using Leray-Schauder degree theory and the method of upper and lower solutions, we obtain a solution for nonlinear boundary-value problem (ϕ(u′))′ = ƒ(t, u, u′) l(u, u′) = 0, where l(u, u′) = 0 denotes the three-point boundary conditions on [0, T], and ϕ is a homeomorphism such that ϕ(0) = 0.Text10 pages1 file (.pdf)enAttribution 4.0 InternationalBoundary value problemsSchauder fixed point theoremLeray-Schauder degreeLower and upper solutionsArticle