Authors
Shalu Choudhary
Department of Mathematics, Uttaranchal University, Dehradun, India
Sunil
Department of Mathematics, National Institute of Technology, Hamirpur, India
© 2019 Shalu Choudhary, Sunil, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.