Document Type : Research Article
Authors
1 Departments of Mathematics, Faculty of Basic sciences, Velayat University, Iranshahr, Iran
2 University of Sistan and Baluchestan, Zahedan, Iran.
3 Department of Applied Mathematics, Ferdowsi University of Mashhad, Mashhad, Iran.
4 Mosaheb Institute of Mathematics, Kharazmi University, Tehran, Iran.
Abstract
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