PageHeader : Funkcialaj Ekvacioj, 40 (1997) 313-333 Title : Almost Global Existence of Solutions for the Quadratic Semilinear Title : Klein-Gordon Equation in One Space Dimension AuthorInfo : By AuthorInfo : Kazunori MORIYAMA, Satoshi TONEGAWA and Yoshio TSUTSUMI AuthorInfo : (University of Tokyo, Japan) AuthorInfo : Dedicated to Professor Hikosaburo Komatsu on his sixtieth birthday section : 1. Introduction section : 2. Existence of the transformation and its regularity section : 3. Proof of the Main Theorem subsection : Step 1. Local existence subsection : Setp2. A priori decay estimate subsection : Step 3. A priori energy estimate subsection : Step 4. The proof of the Main Theorem concluded section : References