1. Department of Mathematics, College of Science, University of Baghdad, Baghdad 10071, Iraq
2. Faculty of Science and Information Technology, Mathematics Department, Jadara University, Irbid 21110, Jordan
3. Institute of Mathematics, University of Debrecen, Pf. 400, H-4002 Debrecen, Hungary
4. Jadara University Research Center, Jadara University, Irbid 21110, Jordan
5. Department of Mathematics, College of Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates
6. Department of Mathematics and Computer Science, University of Oradea, 1 Universitatii Street, 410087 Oradea, Romania