On Implicit Neutral Tempered ψ-Caputo Fractional Differential Equations with Delay via Densifiability Techniques

This article is a subject about the existence results for a class of tempered ψ-Caputo fractional differential equations. These problems encompassed nonlinear implicit neutral fractional differential equations involving various types of delays, including finite, infinite, and state-dependent delays. The results are based on the concept of the degree of non densifiability (DND) combined with Darbo type fixed point theorem on Banach space using the properties of the phase space. In the last section, we provide some examples to illustrate our obtained results.