1. Department of Mathematics, Faculty of Sciences, University of Badji Mokhtar-Annaba, Annaba, Algeria + Département des Mathématiques et Informatique, Faculté des Sciences et Technologie, Université de Ghardaia, Zone scientifique, Ghardaia, Algeria
2. Laboratory of mathematics, Informatics and Systems (LAMIS), Larbi Tebessi University, Tebessa, Algeria
3. Laboratory of Numerical Analysis and Optimization and Statistics (LANOS), University of Badji Mokhtar-Annaba, Annaba, Algeria + The Higher School of Industrial Technologies-Annaba, cité Safsaf, Annaba, Algeria