Existence and blow up of small-amplitude nonlinear waves with a sign-changing potential

Research paper by Paschalis Karageorgis

Indexed on: 09 Mar '05Published on: 09 Mar '05Published in: Mathematics - Analysis of PDEs


We study the nonlinear wave equation with a sign-changing potential in any space dimension. If the potential is small and rapidly decaying, then the existence of small-amplitude solutions is driven by the nonlinear term. If the potential induces growth in the linearized problem, however, solutions that start out small may blow-up in finite time.