Pour une équation aux dérivées partielles en dimension un d'espace, admettant une solution homogène en espace et périodique en temps, on montre l'existence, au voisinage de cette solution, d'une famille à un paramètre d'ondes progressives paramétrisées par leur nombre d'onde k (k=0 correspondant à la solution spatialement homogène initiale). La justification, élémentaire, est basée sur un argument de perturbation singulière (théorème de la variété centrale globale de Fenichel).
For a partial differential equation in spatial dimension one, admitting a spatially homogeneous time periodic solution, we show the generic existence, close to this solution, of a one-parameter family of travelling waves parametrized by their wave number k (k=0 corresponding to the spatially homogeneous initial solution). The argument is elementary and relies on a direct application of singular perturbation theory (Fenichel's global center manifold theorem).
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@article{CRMATH_2002__334_9_833_0, author = {Risler, Emmanuel}, title = {Travelling waves and dispersion relation in the spatial unfolding of a periodic orbit}, journal = {Comptes Rendus. Math\'ematique}, pages = {833--838}, publisher = {Elsevier}, volume = {334}, number = {9}, year = {2002}, doi = {10.1016/S1631-073X(02)02363-4}, language = {en}, url = {http://www.numdam.org/articles/10.1016/S1631-073X(02)02363-4/} }
TY - JOUR AU - Risler, Emmanuel TI - Travelling waves and dispersion relation in the spatial unfolding of a periodic orbit JO - Comptes Rendus. Mathématique PY - 2002 SP - 833 EP - 838 VL - 334 IS - 9 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/S1631-073X(02)02363-4/ DO - 10.1016/S1631-073X(02)02363-4 LA - en ID - CRMATH_2002__334_9_833_0 ER -
%0 Journal Article %A Risler, Emmanuel %T Travelling waves and dispersion relation in the spatial unfolding of a periodic orbit %J Comptes Rendus. Mathématique %D 2002 %P 833-838 %V 334 %N 9 %I Elsevier %U http://www.numdam.org/articles/10.1016/S1631-073X(02)02363-4/ %R 10.1016/S1631-073X(02)02363-4 %G en %F CRMATH_2002__334_9_833_0
Risler, Emmanuel. Travelling waves and dispersion relation in the spatial unfolding of a periodic orbit. Comptes Rendus. Mathématique, Tome 334 (2002) no. 9, pp. 833-838. doi : 10.1016/S1631-073X(02)02363-4. http://www.numdam.org/articles/10.1016/S1631-073X(02)02363-4/
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