| Affiliation: | 1. Department of Mathematics and Statistics, Sultan Qaboos University, P. O. Box 36, Al-Khod 123, Muscat, Oman;2. Department of Mathematics, Industrial Mathematics Group, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;3. Department of Mathematics, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India;1. School of Materials Science and Engineering, Shandong University, Jinan 250061, China;2. School of Mathematics, Shandong University, Jinan 250100, Shandong, China;3. Department of Applied Mathematics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong;1. School of Mathematical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, PR China;2. Department of Mathematical Sciences, Michigan Technological University, Houghton, MI 49931, United States;1. College of Mathematics and Statistics, Chongqing Technology and Business University, Chongqing 400067, China;2. Chongqing Key Laboratory of Social Economic and Applied Statistics, Chongqing Technology and Business University, Chongqing 400067, China |
