Institution: | [1]Laboratory of Mathematics and Complex Systems, School of Mathematical Sciences, Beijing Normal University, Beijing 100875, China [2]Univ. Bretagne-Sud, CNRS UMR 6205, LMBA, Campus de Tohannic, F-56000 Vannes, FranceSchool of Mathematics and Computing Science, Changsha University of Science and Technology, Changsha 410004, China [3]School of Mathematics and Computing Science, Changsha University of Science and Technology, Changsha 410004, China |