Document Type : Research Paper
Authors
1 Department of Mathematics, West Tehran Branch, Islamic Azad University, Tehran, Iran.
2 University of applied science and technology, central of peechkar, Pakdasht, Iran.
3 Department of Mathematics, Marivan Branch, Islamic Azad University, Marivan, Iran.
4 University of applied science and technology, central of peechkar, Varamin, Iran.
Abstract
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