Abdelaziz El Boukili
(1), Amar Rhazi
(2), Bouazza El Wahbi
(3)
(1)
Department of Mathematics, Ibn Tofaïl University, Faculty of Sciences, Morocco,
(2)
Department of Mathematics, Ibn Tofaïl University, Faculty of Sciences, Morocco,
(3)
Department of Mathematics, Faculty of Sciences, Ibn Tofail University, Morocco