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arXiv 1107.3543math.AP
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含双稳态反应项的多孔介质方程的界面动力学

Interface dynamics of the porous medium equation with a bistable reaction term

Matthieu Alfaro, Danielle Hilhorst

摘要:

本文考虑了一个在种群动力学中出现的退化偏微分方程,即带有双稳态反应项的多孔介质方程。我们研究它的渐近行为作为一个小参数,有关的扩散界面的厚度,趋于零。我们证明了快速形成的过渡层,然后传播。我们证明了收敛到一个尖锐的接口限制,其正常速度,在每一点上,是基本的退化行波。

英文摘要:

We consider a degenerate partial differential equation arising in population dynamics, namely the porous medium equation with a bistable reaction term. We study its asymptotic behavior as a small parameter, related to the thickness of a diffuse interface, tends to zero. We prove the rapid formation of transition layers which then propagate. We prove the convergence to a sharp interface limit whose normal velocity, at each point, is that of the underlying degenerate travelling wave.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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