PageHeader : Funkcialaj Ekvacioj, 37 (1994) 1-18 Title : Global Existence and the Life Span of Solutions of Semilinear Title : Wave Equations with Data of Non Compact Support in Three Title : Space Dimensions AuthorInfo : By AuthorInfo : Kimitoshi TSUTAYA AuthorInfo : (Waseda University, Japan) section : 1. Introduction section : 2. Main results section : 3. Decay estimate section : 4. The basic estimate section : 5. Proof of Theorem 1, 2 section : References