| Affiliation: | 1. Department of Applied Mathematics, School of Science, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, People’s Republic of China;2. Department of Mathematics, Saratov University, Astrakhanskaya 83, Saratov 410012, Russia;1. Department of Mathematics, Yonsei University, 50 Yonseiro Seodaemungu, Seoul, Republic of Korea;2. School of Mathematics, Korea Institute for Advanced Study, 85 Hoegiro Dongdaemungu, Seoul, Republic of Korea;1. School of Science, Xi’an Shiyou University, Xi’an 710065, PR China;2. College of Mathematics and Information Science, Shaanxi Normal University, Xi’an 710062, PR China;1. School of Mathematics and Information Sciences, North China University of Water Resources and Electric Power, Zhengzhou 450011, PR China;2. College of Mathematics, Xiamen University, Xiamen 361005, PR China;3. College of Mathematics, Jilin University, Changchun 130012, PR China |
