1. Department of Mathematics, Al-Zaytoonah University of Jordan, Amman, Jordan
2. Department of Mathematics, University of Kalyani Kalyani, Nadia 741235, West Bengal, India,
3. Gour Mahavidyalaya Mangalbari, Malda 732142, West Bengal, India,
4. Department of Mathematics, Chakdaha College, Chakdaha, Nadia 741222, West Bengal, India,