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On Semipositone Non-Local Boundary-Value Problems with Nonlinear or Affine Boundary Conditions

Published online by Cambridge University Press:  02 November 2016

Christopher S. Goodrich*
Affiliation:
Department of Mathematics, Creighton Preparatory School, Omaha, NE 68114, USA (cgood@prep.creighton.edu)

Abstract

We consider the boundary-value problem

where H: [0,+∞) → ℝ and f : [0, 1] × ℝ → ℝ are continuous and λ > 0 is a parameter. We show that if H satisfies a boundedness condition on a specified compact set, then this, together with an assumption that H is either affine or superlinear at +∞, implies existence of at least one positive solution to the problem, even in the case where we impose no growth conditions on f. Finally, since it can hold that f(t, y) < 0 for all (t, y) ∈ [0, 1]×ℝ, the semipositone problem is included as a special case of the existence result.

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 2016 

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