1.Department of Mathematics, University of Science and Technology of China, Hefei 230026, China; 2.Department of Mathematics, Huzhou Teacher's College, Huzhou 313000, China
About author:HU Zhang-jian(1957-),male,native of Tongxiang,Zhejiang,a professor of Huzhou Teacher's College,engages in function theory and operator theory;LIU Tai-shun(1957-),male,native if Huoshan,Anhui, a professor of University of Science and Technology of China,engages in SCV.