1. Department of Mathematics, Alagappa University, Karaikudi 630004, India
2. Ramanujan Centre for Higher Mathematics, Alagappa University, Karaikudi 630003, India
3. Ramanujan Institute for Advanced Study in Mathematics, University of Madras, Chennai 600005, India
4. Department of International Affairs and Education, Gangseo University, Seoul 07661, Republic of Korea
5. Department of Computer Science and Engineering, Sejong University, Seoul 05006, Republic of Korea
6. Department of Electronics, Information and Communication Engineering, Kangwon National University, Samcheok-si 25913, Gangwon State, Republic of Korea