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On the Solutions of a Singular Nonlinear Periodic Boundary Value Problem

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Abstract

In this paper, we consider the following singular nonlinear problem

$$\left\{ \begin{gathered} \tfrac{1}{A}(Au')' - qu = - f( \cdot ,u){\text{ a}}{\text{.e on (0,1),}} \hfill \\ u(0) = u(1),{\text{ }}Au'(0) = Au'(1), \hfill \\ \end{gathered} \right.$$

where A is a positive continuous function on (0,1), q is a nonnegative measurable function on [0,1] and f is a nonnegative regular function on (0,1)×(0,∞).

We suppose that ∫ 10 dt/A(t)<∞ and 0<∫ 10 A(t)q(t) dt<∞. Then we prove the existence and the uniqueness of a positive solution of this problem (P).

Our approach is based on the use of the Green's function and the Schauder's fixed point theorem.

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Maagli, H. On the Solutions of a Singular Nonlinear Periodic Boundary Value Problem. Potential Analysis 14, 437–447 (2001). https://doi.org/10.1023/A:1011254307524

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  • DOI: https://doi.org/10.1023/A:1011254307524

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