Dr. Dachun Yang

School of Mathematical Sciences
Beijing Normal University
Beijing 100875
People's Republic of China

Address: Second Main Building (后主楼) 1116

Phone: 0086-10-58805472

Fax: 0086-10-58805472

E-mail: dcyang@bnu.edu.cn

http://math0.bnu.edu.cn/^~dcyang/