Authors index - X

Zheng Xiangqi

School of Mathematics, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.

J. Xiong

Department of Mathematics, University of Tennessee, Knoxville, Tennessee 37996-1300, USA, and Department of Mathematics, Hebei Normal University, Shijiazhuang 050016, PRC

Weijun Xu

Beijing International Center for Mathematical Research, Peking University, China

S. S. Xudayarov

Bukhara State University, The department of Mathematics, 11, M.Iqbol, Bukhara, Uzbekistan.

- Xue-Mei Li

Department of Mathematics, Imperial College London. Email:~xue-mei.li@imperial.ac.uk