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