Affiliation: | 1. Mathematics Department , Faculty of Science, Al-Azhar University , Nasr City, 11884, Cairo, Egypt;2. Mathematics Department , Faculty of Science, Al-Azhar University , Nasr City, 11884, Cairo, Egypt;3. Department of Mathematical science, Faculty of Applied Science , Umm Al-Qura University , P.O. 6503 uint 75, Makkah, Saudi Arabia |