Positive Solutions for Nonlinear Differential Equations with Periodic Boundary Condition

الملخص EN

We study the existence of positive solutions for second-order nonlinear differential equations with nonseparated boundary conditions.

Our nonlinearity may be singular in its dependent variable.

The proof of the main result relies on a nonlinear alternative principle of Leray-Schauder.

Recent results in the literature are generalized and significantly improved.