by Nandu Prasad Koiri | Ajay Kumar Chaudhary | Rajeev Kumar | K. B. Manandhar4 | Department of Mathematics, Tri-Chandra Multiple Campus, Tribhuvan University, Nepal | Department of Mathematics, Tri-Chandra Multiple Campus, Tribhuvan University, Nepal | Department of Mathematics, Arunodaya University, Itanagar, Arunachal, India | Department of Mathematics, School of Science, Kathmandu University, Nepal
