Affiliation: | 1. School of Mathematics, Shanghai University of Finance and Economics, 777 Guoding Road, Shanghai, 200433, People’s Republic of China 2. Department of Applied Mathematics, National Chiao Tung University, No.1001 University Road, Hsinchu, 30013, Taiwan 3. Department of Mathematics, University of Texas at Arlington, P.O. Box 19408, Arlington, TX, 76019-0408, USA
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