Institution: | [1]Department of Mathematics, Faculty of Science, Taibah University, Al-Madeenah Al-Munawwarah, P. O. Box 344, Kingdom of Saudi Arabia [2]Dcpartmcnt of Mathematics, Faculty of Science, Sohag University, Sohag 82524, Egypt [3]College of Applied Medical Sciences, Turabah, Taif University, Kingdom of Saudi Arabia |