Xu Xingwang(徐兴旺)
http://www.math.nus.edu.sg/~matxuxw/
Xu Xingwang Department of Mathematics National University of Singapore 2 Science Drive 2, Singapore 117543 Republic of Singapore matxuxw@nus.edu.sg (65) 6516-2771 (office) (65) (home) (65) 779-5452 (fax)