Authors
Chakir Tajani
Department of Mathematics Polydisciplinary faculty of Larache, Abdelmalek Essaadi University,, Tétouan, Morocco
Houda Kajtih
Faculty of Sciences and Techniques of Tangier, Abdelmalek Essaadi University,, Tétouan, Morocco
Ali Daanoun
Faculty of Sciences and Techniques of Tangier, Abdelmalek Essaadi University,, Tétouan, Morocco
