| Institution: | 1. Basic Department, Hebei University of Economy & Trade, 106 Hongqi Street, Shijiazhuang, Hebei Province 050091, People''s Republic of China;2. Mathematics Department, Hebei University, Baoding, Hebei Province 071002, People''s Republic of China;1. Department of Mathematical Sciences, Tsinghua University, Beijing 100084, People''s Republic of China;2. Academy of Mathematics and Systems Sciences, Academia Sinica, Beijing 100080, People''s Republic of China;1. Department of Mathematics, Ohio University, Athens, OH 45701, USA;2. Department of Mathematics and Statistics, PL35 (MaD), FIN-40014 University of Jyväskylä, Finland;1. Department of Applied Mathematics, Tongji University, Shanghai 200092, China;2. College of Mathematics and Computer, Hebei University, Baoding 071002, China |
