Affiliation: | 1. School of Mathematical Sciences and Wu Wen-Tsun Key Laboratory of Mathematics, University of Science and Technology of China, Hefei, 230026, China;2. School of Mathematics, University of Manchester, Oxford Road, Manchester, M13 9PL, UK;1. College of Mathematics and Statistics, Chongqing Three Gorges University, Chongqing, 404000, China;2. School of Mathematical Science, South China Normal University, Guangzhou, 510631, China;1. School of Economics, Nanjing University of Finance and Economics, Nanjing, Jiangsu 210023, China;2. CAS Wu Wen-Tsun Key Laboratory of Mathematics, School of Mathematical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China |