Authors
Ibn Zohr University, Faculty of sciences, Department of mathematics, Agadir, Morocco
Elhoucien Elqorachi
Ibn Zohr University, Faculty of sciences, Department of mathematics, Agadir, Morocco
© 2023 Youssef Aserrar, Elhoucien Elqorachi, published by University of Silesia in Katowice, Institute of Mathematics
This work is licensed under the Creative Commons Attribution 4.0 License.