Abstract

By using the Leggett-Williams norm-type theorem due to O’Regan and Zima and constructing suitable Banach spaces and operators, we investigate the existence of positive solutions for fractional p-Laplacian boundary value problems at resonance. An example is given to illustrate the main results.

Highlights

  • Boundary value problems at resonance have attracted more and more attention

  • To the best of our knowledge, there is no paper to show the existence of a positive solution for boundary value problems with a nonlinear derivative operator at resonance by using Leggett-Williams norm-type theorems

  • Motivated by the excellent results mentioned above, we will discuss the existence of positive solutions for the p-Laplacian boundary value problem

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Summary

Introduction

Boundary value problems at resonance have attracted more and more attention. Many authors studied the existence of solutions for these problems by using Mawhin’s continuous theorem [ ] and its extension obtained by Ge and Ren [ ]; see [ – ] and the references cited therein. By using Leggett-Williams norm-type theorems due to O’Regan and Zima [ ], the existence of positive solutions for the boundary value problems at resonance with a linear derivative operator has been investigated (see [ – ]). To the best of our knowledge, there is no paper to show the existence of a positive solution for boundary value problems with a nonlinear derivative operator (for instance, p-Laplacian operator) at resonance by using Leggett-Williams norm-type theorems. Motivated by the excellent results mentioned above, we will discuss the existence of positive solutions for the p-Laplacian boundary value problem. Since CDβ + [φp(CDα + ·)] is a nonlinear operator, we cannot solve the problem U(t) is a solution of the following problem:. Proof Assume that u(t) is a solution of the problem

Proof It is easy to see that
It follows from u
Proof Set
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