Institution: | 1. Department of Mathematics, Faculty of Education (AL-Arish), Suez Canal University, AL-Arish 45111, Egypt;2. Department of Mathematics, Faculty of Science, Menoufia University, Sheben El-Koom, Egypt;3. Department of Mathematics, Faculty of Science, AL-Azhar University, Nasr City, Egypt;4. Community College in Riyadh, King Saud University, Saudi Arabia |