Atangana-Baleanu-Caputo differential equations with mixed delay terms and integral boundary conditions

In this research work, we investigate a class of Atangana-Baleanu-Caputo (ABC) differential equations (DEs) having proportional and discrete delay terms accompanied by integral boundary conditions. We study the two important aspects, that is, the existence of the solution and stability analysis for the problem mentioned above. We confirm the existence of at least one solution via Schaefer's fixed-point theorem and its uniqueness by Banach's fixed-point theorem. Moreover, for stability analysis, we use the concept of Hyers-Ulam stability. For application purposes, we apply the main results to a numerical problem for specific values of the parameters involved.