1. Department of Mathematics, Faculty of Exact SciencesUniversity of El Oued El Oued Algeria
2. Laboratory of Pure and Applied MathematicsAmar teledji University Laghouat Laghouat Algeria
3. Department of Mathematics, College of Sciences and Arts, Al‐RasQassim University Buraydah Kingdom of Saudi Arabia
4. Department of Economic MathematicsSouthwestern University of Finance and Economics Chengdu China