Authors
RACHID ECHARGHAOUI
Department of Mathematics, Faculty of Sciences, Ibn Tofail University, Kenitra, MOROCCO
ZAKARIA ZAIMI
Department of Mathematics, Faculty of Sciences, Ibn Tofail University, Kenitra, MOROCCO
© 2023 RACHID ECHARGHAOUI, ZAKARIA ZAIMI, published by Slovak Academy of Sciences, Mathematical Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.