1. Department of Mathematics, School of Advanced Sciences, VIT, Vellore, India
2. Department of Applied Mathematics, Yogi Vemana University, Kadapa, India
3. Department of S& H, Sri Venkateswara Institute of Science and Technology, Kadapa, India
4. Department of Mathematics, Faculty of Science, Taibah University, Al-Madinah Al-Munawwarah, Saudi Arabia
5. Department of Mathematics, Faculty of Science, Aswan University, Aswan, Egypt