Cette Note traite de l'existence de fronts pulsatoires pour une équation de réaction–diffusion en milieu périodique en temps et en espace. Sous certaines hypothèses, il existe deux vitesses et telles qu'il existe des fronts pulsatoires de vitesse c pour tout et qu'il n'existe pas de tel front de vitesse . Dans le cas d'un terme de réaction de type KPP, nous caractérisons cette vitesse à l'aide d'une famille de valeurs propres associée à l'équation. Enfin, nous étudions la dépendance entre cette vitesse minimale et les coefficients de l'équation.
This Note deals with the existence of pulsating traveling fronts for some reaction–diffusion equation in space–time periodic media. Under some hypotheses, there exist two speeds and such that there exist some pulsating traveling fronts of speed c for all and that there exists no such front of speed . In the case of a KPP-type reaction term, we characterize this speed with the help of a family of eigenvalues associated with the equation. Lastly, we study the dependence between this minimal speed and the coefficients of the equation.
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@article{CRMATH_2008__346_17-18_951_0, author = {Nadin, Gr\'egoire}, title = {Pulsating traveling fronts in space{\textendash}time periodic media}, journal = {Comptes Rendus. Math\'ematique}, pages = {951--956}, publisher = {Elsevier}, volume = {346}, number = {17-18}, year = {2008}, doi = {10.1016/j.crma.2008.07.030}, language = {en}, url = {http://www.numdam.org/articles/10.1016/j.crma.2008.07.030/} }
TY - JOUR AU - Nadin, Grégoire TI - Pulsating traveling fronts in space–time periodic media JO - Comptes Rendus. Mathématique PY - 2008 SP - 951 EP - 956 VL - 346 IS - 17-18 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.crma.2008.07.030/ DO - 10.1016/j.crma.2008.07.030 LA - en ID - CRMATH_2008__346_17-18_951_0 ER -
%0 Journal Article %A Nadin, Grégoire %T Pulsating traveling fronts in space–time periodic media %J Comptes Rendus. Mathématique %D 2008 %P 951-956 %V 346 %N 17-18 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2008.07.030/ %R 10.1016/j.crma.2008.07.030 %G en %F CRMATH_2008__346_17-18_951_0
Nadin, Grégoire. Pulsating traveling fronts in space–time periodic media. Comptes Rendus. Mathématique, Tome 346 (2008) no. 17-18, pp. 951-956. doi : 10.1016/j.crma.2008.07.030. http://www.numdam.org/articles/10.1016/j.crma.2008.07.030/
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