Retraction to “Qualitative analysis of coupled system of sequential fractional integrodifferential equations” [AIMS Mathematics 7(5) (2022) 8012–8034]

Abstract

The journal retracts the paper entitled “Qualitative analysis of coupled system of sequential fractional integrodierential equations” [1]. This article is very similar to A. Wongcharoen, et al. “Existence Results for a Nonlocal Coupled System of Sequential Fractional Dierential Equations Involving -Hilfer Fractional Derivatives” [2]. In accordance with our publishing policies, an investigation was conducted that confirmed the overlap. The article [1] is therefore retracted and shall be marked accordingly. This retraction was approved by the Editor in Chief of the journal AIMS Mathematics. The authors agreed to this retraction.