Existence and multiplicity of positive unbounded solutions for singular BVPs with the φ-Laplacian operator on the half line

Abstract

We provide in this work sufficient conditions for existence and multiplicity of positive unbounded solutions for a class of singular second-order boundary value problem associated with a φ-Laplacian operator and posed on the half-line. The proofs are based on a theo- rem of cone expansion and compression in a Banach space.