PageHeader : Funkcialaj Ekvacioj, 12 (1969), 149-153 Title : On Some Obvious Theorems in Functional Title : Analysis AuthorInfo : By Kiyoshi AKO AuthorInfo : (University of Tokyo) section : Introduction. section : 1. Identity of Two Types of Solutions. section : 2. Some Definitions section : 3. Generalization of the Perron-Frobenius Theorem. section : 4. A Remark. section : References