Affiliation: Department of Mathematics and Informatics, Faculty of Science, Chiba University
Phone: +81-43-290-2713, Fax: +81-43-290-2733
E-mail: sakurai@math.s.chiba-u.ac.jp
Office: Room 611 (6th Floor), Faculty of Science Bldg. 2
Postal Address: 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan