Mittag-Leffler Stability of Homogeneous Fractional-Order Systems With Delay

This note is concerned with a class of homogeneous cooperative systems with bounded time-varying delays described by the Caputo fractional derivative. We focus on the existence, uniqueness, and Mittag-Leffler stability of positive solutions when the associated vector fields are homogeneous with a degree less than or equal to one. Specifically, the solvability is first exploited through the fixed point theory, leveraging the homogeneity of nonlinear terms. Then, a delay-independent condition for Mittag-Leffler stability is established by utilizing the properties of Mittag-Leffler functions and the comparison principle. Finally, the theoretical results are validated by a given numerical example.