Document Type : Research Paper
Authors
^{1} Department of Mathematics, Guilan Science and Research Branch, Islamic Azad University, Rasht, Iran.
^{2} Department of Mathematics, Rasht Branch, Islamic Azad University, Rasht, Iran.
^{3} Department of Mathematics, Azarbaijan Shahid Madani University, Tabriz, Iran.
^{4} Faculty of Financial Sciences, Kharazmi University, Tehran, Iran.
Abstract
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