PageHeader : Funkcialaj Ekvacioj, 21 (1978) 249-259 Title : Mixed Problem for Wave Equation Title : in the Domain with a Corner AuthorInfo : By AuthorInfo : Masaru TANIGUCHI section : 1. Introduction section : 2. Notation section : 3. Reduction to symmetric hyperbolic system section : 4. Mixed problem for symmetric hyperbolic system in the domain with a corner section : 5. The proof of Main Theorem section : References