Special Section on Discrete Mathematics and Its Applications

Mathematics from Tsuda College in 1980, 1982 and 1991, respectively. Since 1992 she has been with Chuo University, where she is currently a full professor in the Department of Information and System Engineering. Her research interests include algorithm theory, computational geometry, discrete mathematics, and their applications. Dr. Imai is a member of IPSJ, JSIAM, ORSJ, Math. Soc. of Japan, and GIS Association in Japan. 1093 IEICE TRANS. FUNDAMENTALS, VOL. E84-A, NO.5 MAY 2001