Authors
Moustafa Beddani
Department of Mathematics, Djillali Liabes University of Sidi Bel-Abbès, Algeria
Benaouda Hedia
Laboratory of Mathematics, University of Tiaret, Tiaret, Algeria
© 2022 Moustafa Beddani, Benaouda Hedia, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.