“…Khan and co-authors [9] investigated the Ulam-Hyers stability through fractal-fractional derivative with power law kernel and the chaotic system based on circuit design. As a result, a great number of papers (see, for instance, monographs [10,11], survey articles [12,13] and the references given there) on the subject have been published, generalizing Ulam's problem and Hyers's theorem in various directions and to other equations [14,15].…”