PageHeader : Funkcialaj Ekvacioj, 27 (1984), 331-366 Title : Mixed Problem for Weakly Hyperbolic Equations of Second Title : Order with Degenerate Neumann Boundary Condition AuthorInfo : Dedicated to Professor Haruo Sunouchi on his 60th birthday AuthorInfo : By AuthorInfo : Masaru TANIGUCHI section : Introduction section : 1. Notations and the Main Theorems section : 2. Some examples for reduction to symmetric hyperbolic systems section : 3. Mixed problem with zero initial data (I) section : 4. Mixed problem with zero initial data (II). section : 5. The existence of the solution in the general case section : References