Nontrivial Solutions Of Higher-Order Nonlinear Singular Fractional Differential Equations With Fractional Multi-Point Boundary Conditions

This paper deals with the existence and multiplicity of nontrivial solutions of fractional multi-point boundary value problems for higher-order nonlinear singular fractional differential equations with sign-changing nonlinear term. The main tool used in the proof is topological degree theory. Some examples are given to illustrate our main results.