1. Department of Mathematics, School of Applied Sciences, REVA University, Bengaluru Karnataka, India
2. Department of Mathematics, School of Applied Sciences, REVA University, Bengaluru, Karnataka, India
3. Department of UG, PG Studies & Research in Mathematics, Nrupathunga University, Bengaluru, Karnataka, India
4. Department of Mathematics, Government First-grade College, Davanagere 577004, India
5. Department of Mathematics, Hindu college, Delhi University, Delhi, India
6. Department of Studies and Research in Mathematics, Davangere University, Davangere-577007, Karnataka, India