Document Type : Original Article
Authors
1 Department of Mathematics, Payame Noor University, P.o.box. 19395-3697, Tehran, Iran
2 Department of Pure Mathematics, Faculty of Mathematics and Computer, Shahid Bahonar University of Kerman, Kerman, Iran
3 Department of Mathematics, Beihang University (BUAA), BUA-Haidian School of Applied Technology, china
Abstract
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