Authors
Esmaeil Azizpour
University of Guilan, Faculty of Mathematical Sciences Department of Pure Mathematics, Rasht
Dordi Mohammad Atayi
University of Guilan, Faculty of Mathematical Sciences Department of Pure Mathematics, Rasht
© 2020 Esmaeil Azizpour, Dordi Mohammad Atayi, published by Lucian Blaga University of Sibiu
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.