Nonlinear Analysis: Theory, Methods & Applications
Differential equations with integral boundary conditions
Journal of Computational and Applied Mathematics
Periodic boundary value problem for the first order impulsive functional differential equations
Journal of Computational and Applied Mathematics
Journal of Computational and Applied Mathematics
Differential equations involving causal operators with nonlinear periodic boundary conditions
Mathematical and Computer Modelling: An International Journal
Journal of Computational and Applied Mathematics
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This paper considers the existence of solutions for a class of integral boundary value problems with causal operators. We build a new comparison theorem. By utilizing the monotone iterative technique and the method of lower and upper solutions, we formulate sufficient conditions under which such problems have extremal or quasisolutions in a corresponding sector.