Yuzuru Sato (Ph. D.), Associate Professor
Complex Systems Research Group, Devision of Mathematical Sciences, RIES / Department of Mathematics, Hokkaido University
Kita 12 Nishi 6, Kita-ku, Sapporo Hokkaido 060-0821, Japan
Phone/Fax: +81-11-706-2889, Email: ysato_at_math.sci.hokudai.ac.jp