Volume 12, Number 3, 555-569, DOI: 10.1007/s11117-007-2144-0

Positive solutions for second-order superlinear repulsive singular Neumann boundary value problems

Jifeng Chu, Xiaoning Lin, Daqing Jiang, Donal O’Regan and Ravi P. Agarwal

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Abstract

In this paper we establish the multiplicity of positive solutions to second-order superlinear repulsive singular Neumann boundary value problems. It is proved that such a problem has at least two positive solutions under reasonable conditions. Our nonlinearity may be repulsive singular in its dependent variable and superlinear at infinity. The proof relies on a nonlinear alternative of Leray-Schauder type and on Krasnoselskii fixed point theorem on compression and expansion of cones.

Mathematics Subject Classification (2000)  34B15

Keywords  Superlinear - repulsive singular - Neumann boundary value problems - positive solutions - leray-Schauder alternative - fixed point theorem in cones

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