1. Department of Mathematics, University of Sousse, Laboratory of Mathematical Physic, Specials Functions and Applications, LR11ES35, École Supérieure des Sciences et de Technologie de Hammam-Sousse, Hammam-Sousse, 4011, Tunisia
2. University of Sousse, Department of Computer Science, ISSATS, Laboratory of Math Physics, Specials Functions and Applications LR11ES35, École Supérieure des Sciences et de Technologie, Sousse, 4002, Tunisia