Institution: | 1. Institute of Mathematics, School of Science, Tianjin University of Technology and Education, Tianjin, 300222, P. R. China 2. Department of Mathematics, University of Jammu, Jammu, 180 006, India 3. Department of Mathematics, Tianjin University, Tianjin, 300072, P. R. China 4. Center for Applied Mathematics of Tianjin University, Tianjin, 300072, P. R. China
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