About author:ZHAO Di(1985-), female, native of Zoucheng, Shandong, a graduate student 2009 of Zhejiang Normal University, engages in complex variables and operator theory.
Supported by:
Supported by the NNSF of China(10771064)； Supported by the Natural Science Foundation of Zhejiang Province(Y7080197, Y6090036, Y6100219)； Supported by the Foundation of Creative Groupin Colleges and Universities of Zhejiang Province(T200924)
