dorsal/arxiv
View SchemaStability of Travelling Waves for a Damped Hyperbolic Equation
| Authors | Th. Gallay, G. Raugel |
|---|---|
| Categories | |
| ArXiv ID | patt-sol/9602004 |
| URL | https://arxiv.org/abs/patt-sol/9602004 |
| DOI | 10.1007/s000330050043 |
Abstract
We consider a nonlinear damped hyperbolic equation in $\real^n$, $1 \le n \le 4$, depending on a positive parameter $\epsilon$. If we set $\epsilon=0$, this equation reduces to the well-known Kolmogorov-Petrovski-Piskunov equation. We remark that, after a change of variables, this hyperbolic equation has the same family of one-dimensional travelling waves as the KPP equation. Using various energy functionals, we show that, if $\epsilon >0$, these fronts are locally stable under perturbations in appropriate weighted Sobolev spaces. Moreover, the decay rate in time of the perturbed solutions towards the front of minimal speed $c=2$ is shown to be polynomial. In the one-dimensional case, if $\epsilon < 1/4$, we can apply a Maximum Principle for hyperbolic equations and prove a global stability result. We also prove that the decay rate of the perturbated solutions towards the fronts is polynomial, for all $c > 2$.
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"abstract": "We consider a nonlinear damped hyperbolic equation in $\\real^n$, $1 \\le n \\le\n4$, depending on a positive parameter $\\epsilon$. If we set $\\epsilon=0$, this\nequation reduces to the well-known Kolmogorov-Petrovski-Piskunov equation. We\nremark that, after a change of variables, this hyperbolic equation has the same\nfamily of one-dimensional travelling waves as the KPP equation. Using various\nenergy functionals, we show that, if $\\epsilon \u003e0$, these fronts are locally\nstable under perturbations in appropriate weighted Sobolev spaces. Moreover,\nthe decay rate in time of the perturbed solutions towards the front of minimal\nspeed $c=2$ is shown to be polynomial. In the one-dimensional case, if\n$\\epsilon \u003c 1/4$, we can apply a Maximum Principle for hyperbolic equations and\nprove a global stability result. We also prove that the decay rate of the\nperturbated solutions towards the fronts is polynomial, for all $c \u003e 2$.",
"arxiv_id": "patt-sol/9602004",
"authors": [
"Th. Gallay",
"G. Raugel"
],
"categories": [
"patt-sol",
"nlin.PS"
],
"doi": "10.1007/s000330050043",
"title": "Stability of Travelling Waves for a Damped Hyperbolic Equation",
"url": "https://arxiv.org/abs/patt-sol/9602004"
},
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