| Affiliation: | 1. Department of Mathematics, Beijing Jiao Tong University, Beijing 100044, China;2. Department of Mathematics, Zhejiang Normal University, Jinhua 321004, Zhejiang, China;3. Department of Mathematics, King Abdulaziz University, Jeddah, Saudi Arabia;4. School of Mathematics, South China University of Technology, Guangzhou 510640, China;5. Department of Mathematics and Statistics, University of South Florida, Tampa, FL 33620, USA;6. College of Mathematics and Systems Science, Shandong University of Science and Technology, Qingdao 266590, Shandong, China;7. International Institute for Symmetry Analysis and Mathematical Modelling, Department of Mathematical Sciences, North-West University, Mafikeng Campus, Private Bag X 2046, Mmabatho 2735, South Africa;1. Department of Mathematics, Ohio University, Athens, Ohio, USA;2. Department of Mathematics, Lafayette College, Easton, Pennsylvania, USA |
