Periodic Boundary Value Problems for a Class of Functional Differential Equations |
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| Authors: | Eduardo Liz J.J. Nieto |
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| Affiliation: | aDepartamento de Matemática Aplicada, E.T.S.I.I. Universidad de Vigo, Lagoas-Marcosende, Vigo, Spain;bDepartamento de Análisis Matemático, Fac. de Matemáticas, Universidad de Santiago de Compostela, Spain |
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| Abstract: | In this paper we show that the method of upper and lower solutions coupled with the monotone iterative technique is valid to obtain constructive proofs of existence of solutions for nonlinear periodic boundary value problems of functional differential equations without assuming properties of monotonicity in the nonlinear part. |
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