Affiliation: | [1]School of Mathematics and Information Sciences, Jiangxi Normal University, Nanchang 330022, China School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China [2]College of Science, Wuhan University of Science and Technology, Wuhan 430081, China [3]School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China [4]College of Mathematics and Statistics, Hubei Normal University, Huangshi 435002, China) |