Document Type : Original Article
Authors
1 astronomy, faculty of science,al-azhar university
2 Astronomy and Meteorology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt.
3 Mathematics Department, Faculty of Science (Girls), Al-Azhar University, Cairo, Egypt
4 Mathematics Department, Faculty of Science (Girls), Al-Azhar University, Cairo, Egypt.
5 Ph.D student in Math. Dep., Faculty of Science (Girls), Al-Azhar University, Cairo.
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