About HIRABA Seiji
About Tokyo Univ. Sci., Chiba, JPN
About Osaka Journal of Mathematics
About Markov process
About dynamical system
About many-particle system
About Brownian motion
About martingale
About Emigration and Immigration
About absorbing boundary condition
About half space
About Fluctuation phenomena,random process,Brownian motion,and transport process
About Classical mechanics
About Theory of probability
About 半空間
About 運動
About 無限
About 粒子系