Affiliation: | 1.Department of Mathematics, Nanchang University, Nanchang, 330031, People’s Republic of China ;2.Max-Planck-Institute for Mathematics in the Sciences, 04103, Leipzig, Germany ;3.Institute of Mathematics, Hangzhou Dianzi University, Hangzhou, 310018, People’s Republic of China ;4.Department of Physics, Nanchang University, Nanchang, 330031, People’s Republic of China ;5.School of Mathematical Sciences, Capital Normal University, Beijing, 100048, People’s Republic of China ; |