Kevrekidis, P.G.; Weinstein, M.I. - In: Mathematics and Computers in Simulation (MATCOM) 62 (2003) 1, pp. 65-78
. A consequence of our analysis is a class of spatially localized, time quasiperiodic solutions of the discrete nonlinear … Schrödinger equation. We demonstrate, however, that this class of quasiperiodic solutions is rather special and that its natural … generalizations yield only metastable quasiperiodic solutions. …