About KATAYAMA Soichiro
About Wakayama Univ.
About KUBO Hideo
About Tohoku Univ.
About Funkcialaj Ekvacioj. International Series
About wave equation
About asymptotic solution
About initial value problem
About radiation field
About solution (mathematics)
About scattering theory
About convergence rate
About Cauchy problem
About 混合問題
About Wave theory
About 波動方程式
About 収束速度