PageHeader : Funkcialaj Ekvacioj, 12 (1969), 227-232 Title : The Eigenvalue Problem in Unbounded Domains AuthorInfo : By Kazumasa SUZUKI AuthorInfo : (Gakshuin High School) AuthorInfo : Dedicated to Professor Tokui Sat? on the Occasion of His Retirement section : Introduction. section : 1. Preliminaries. section : 2. Eigenvalue problems. section : References