Authors
Fathi Hesham Khedr
Department of Mathematics, Faculty of Science, Assiut University, Egypt
Osama Rashed Sayed
Department of Mathematics, Faculty of Science, Assiut University, Egypt
© 2023 Fathi Hesham Khedr, Osama Rashed Sayed, published by Slovak Academy of Sciences, Mathematical Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.