PageHeader : Funkcialaj Ekvacioj, 34 (1991) 143-155 Title : Viscosity Solutions of a System of Nonlinear Second-Order Title : Elliptic PDEs Arising in Switching Games AuthorInfo : By AuthorInfo : Hitoshi ISHII and Shigeaki KOIKE AuthorInfo : (Chuo University and Waseda University, Japan) section : 1. Introduction section : 2. Definition of viscosity solutions section : 3. A comparison result section : 4. Existence of continuous solutions section : References