摘要
Submission Please type your paper in LaTeX, and e-mail the pdf file. The editorial office will confirm receipt within 3 days. If you do not receive the receipt letter, please send an e-mail to ask. The address is Editorial Board, Acta Mathematica Sinica （English Series）, Institute of Mathematics, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China, emaih ActaMath@amss.ac.cn.
Submission Please type your paper in LaTeX, and e-mail the pdf file. The editorial office will confirm receipt within 3 days. If you do not receive the receipt letter, please send an e-mail to ask. The address is Editorial Board, Acta Mathematica Sinica （English Series）, Institute of Mathematics, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China, emaih ActaMath@amss.ac.cn.
