Modulated Fourier expansions of highly oscillatory differential equations
Artikel i vetenskaplig tidskrift, 2003

Modulated Fourier expansions are developed as a tool for gaining insight into the long-time behavior of Hamiltonian systems with highly oscillatory solutions. Particle systems of Fermi-Pasta-Ulam type with light and heavy masses are considered as an example. It is shown that the harmonic energy of the highly oscillatory part is nearly conserved over times that are exponentially long in the high frequency. Unlike previous approaches to such problems, the technique used here does not employ nonlinear coordinate transforms and can therefore be extended to the analysis of numerical discretizations.

Adiabatic invariants

Exponentially small error estimates

Highly oscillatory differential equations

Modulated Fourier expansion

Multiple time scales


David Cohen

Université de Genève

Ernst Hairer

Université de Genève

Christian Lubich

Universität Tübingen

Foundations of Computational Mathematics

1615-3375 (ISSN) 1615-3383 (eISSN)

Vol. 3 4 327-345





Mer information

Senast uppdaterat