Authors
Rebiha Benterki
Department of Mathematics, University Mohamed El Bachir El Ibrahimi, Algeria
Ahlam Belfar
Department of Mathematics, University Mohamed El Bachir El Ibrahimi, Algeria
© 2022 Rebiha Benterki, Ahlam Belfar, published by Slovak Academy of Sciences, Mathematical Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.