Advances in Difference Equations (May 2021)
The method of upper and lower solutions for a class of fractional differential coupled systems
Abstract
Abstract In this paper, we investigate a class of nonlocal boundary value problems of nonlinear fractional functional differential coupled systems with state dependent delays. The method of upper and lower solutions is established and some new results for the multiplicity of solutions of the boundary value problem are obtained. An example is also presented to illustrate our main results.
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