1. Department of Mathematical Sciences, Faculty of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
2. Department of Mathematics, Government Arts College for Men, Krishnagiri, 635 001 Tamilnadu, India
3. Research and Development Wing, Live4Research, Tiruppur, 638 106 Tamilnadu, India
4. SNS College of Technology, Coimbatore, Tamilnadu, India