Abstract
We present recent developments in the theory of quasi-periodic solutions to nonlinear PDEs, such as the nonlinear Schrödinger and the nonlinear Klein-Gordon equations. These solutions hold in arbitrary dimensions, and the quasi-periodicity can be either in time or space. The method hinges on multi-scale analysis, harmonic analysis and algebraic analysis.
Information
Digital Object Identifier: 10.2969/aspm/08510463