Institution: | 1.Institute of Mathematics,Henan Polytechnic University,Jiaozuo City, Henan Province,China;2.College of Mathematics,Inner Mongolia University for Nationalities,Tongliao, Inner Mongolia,China;3.Secondary School,Fenyang, Lüliang, Shanxi,China;4.Department of Mathematics, College of Science,Tianjin Polytechnic University,Tianjin City,China;5.School of Mathematics and Informatics,Henan Polytechnic University,Jiaozuo City, Henan Province,China |