PageHeader : Funkcialaj Ekvacioj, 10 (1957), 167-174 Title : A Characterization of Hyperbo.lic Title : Convolution Operators AuthorInfo : By Takao KAKITA AuthorInfo : (Waseda University) section : 1. Introduction and results. section : 2. Proof of Theorem 2. section : 3. Proposition 1. section : References