Figueroa Sestelo, RubénLópez Pouso, RodrigoRodríguez López, Jorge2019-10-262019-10-262018Figueroa, R., López Pouso, R., & Rodríguez-López, J. (2018). Extremal solutions for second-order fully discontinuous problems with nonlinear functional boundary conditions. Electronic Journal Of Qualitative Theory Of Differential Equations, (29), 1-14. doi: 10.14232/ejqtde.2018.1.29http://hdl.handle.net/10347/19943We provide new results concerning the existence of extremal solutions for a class of second-order problems with nonlinear functional boundary conditions where the nonlinearity considered may be discontinuous with respect to all of its variables. The main result relies on recent fixed point theorems for discontinuous operators and the lower and upper solution method.engThis is an open access article distributed under the Creative Commons Attribution License (CC BY 4.0)http://creativecommons.org/licenses/by/4.0/Discontinuous differential equationsUpper and lower solutionsFixed point theoremsjournal article10.14232/ejqtde.2018.1.291417-3875open access