1. Laboratory of Algebra, Number Theory and Nonlinear Analysis, LRES, Department of Mathematics, Faculty of Sciences, University of Monastir, Monastir, Tunisia + Department of Mathematics, Higher Institute of Applied Mathematics and Computer Sciences, University of Kairouan, Kairouan, Tunisia + Department of Mathematics, Faculty of Sciences, University of Tabuk, Tabuk, Saudi Arabia
2. Laboratory of Analysis, Probability and Fractals, LRES, Department of Mathematics, Faculty of Sciences, University of Monastir, Monastir, Tunisia