1. Department of Mathematics, B.L.D.E. A’s V. P. Dr. P. G. Halakatti College of Engineering and Technology, Vijayapur-586103, Karnataka, India
2. Department of Mathematics, Vishwakarma University, Pune-411048, Maharashtra, India
3. Department of Mathematics, Bheemanna Khandre Institute of Technology, Bhalki-585328, Karnataka, India
4. Department of Mathematics, Basaveshwar Engineering College (Autonomous), Bagalkot-587103, Karnataka, India
5. Department of Mechanical Engineering, WOLLO University, Kombolcha Institute of Technology, P O. Box 208, Kombolcha, Ethiopia