Functional k-Generalized Ψ-Hilfer Fractional Differential Equations in b-Metric Spaces

This paper deals with some existence results for a class of k-generalized ψ-Hilfer implicit fractional differential equations in b-metric spaces. The results are based on the α-φ-Geraghty type contraction and the fixed point theory. We illustrate our results by an example in the last section.