Cabada Fernández, AlbertoDimitrov, Nikolay2026-02-062026-02-062015Existence results for singular φ-Laplacian problems in presence of lower and upper solutions Alberto Cabada (Spain) and Nikolay D. Dimitrov (Bulgaria) Analysis and Applications 2015 13:02, 135-1480219-5305https://hdl.handle.net/10347/45723This paper is devoted to the study of the existence of solutions to singular φ-Laplacian problems, coupled with nonlinear functional boundary value conditions, in presence of a pair of well-ordered lower and upper solutions. The main result ensures the existence of solutions for a functional problem. It improves previous ones due to Bereanu and Mawhin related to non-homogeneous Dirichlet equations. Some of the used arguments follow the line of some previous papers devoted to regular φ-Laplacian operatorsenghttps://creativecommons.org/licenses/by/4.0/Singular φ-LaplacianNonlinear functional conditionsLower and upper solutions1202 Análisis y análisis funcionaljournal article10.1142/S02195305145001581793-6861open access