| Affiliation: | 1. Institute of Mathematics, Chinese Academy of Sciences, Beijing 100190, China;2. Dipartimento di Matematica, Universitá di Milano, Via Saldini 50, 20133 Milano, Italy;1. Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian, 223003, PR China;2. Department of Mathematics, Southeast University, Nanjing, 210096, PR China;3. Faculty of Science, Jiangsu University, Zhenjiang, Jiangsu, 212013, PR China;1. School of Mathematics and Statistics, Jiangsu Normal University, Xuzhou 221116, China;2. School of Science and Technology, University of New England, Armidale, NSW 2351, Australia;1. School of Mathematics and Statistics, Huazhong University of Science and Technology, Wuhan 430074, China;2. Hubei Key Laboratory of Engineering Modeling and Scientific Computing, Huazhong University of Science and Technology, Wuhan 430074, China;1. School of Mathematics and Statistics, Central South University, Changsha, Hunan 410083, PR China;2. School of Mathematics and Statistics, Qujing Normal University, Qujing, Yunnan, 655011, PR China |
