Authors
Doria Affane
LMPA Laboratory, Department of Mathematics, Jijel University, Algeria
Loubna Boulkemh
LMPA Laboratory, Department of Mathematics, Jijel University, Algeria
© 2021 Doria Affane, Loubna Boulkemh, published by Sapientia Hungarian University of Transylvania
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.