Existence of a Solution for a Wave Equation and an Elliptic Dirichlet Problem
Sumalee Unsurangsie · University of North Texas Digital Library (University of North Texas) · 1988
In this paper we consider an existence of a solution for a nonlinear nonmonotone wave equation in [0,π]xR and an existence of a positive solution for a non-positone Dirichlet problem in a bounded subset of R^n.