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arXiv 2106.03030math.AP
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非线性阻尼wave equation到非线性heat equation能量空间的无时滞极限

Non-delay limit in the energy space from the nonlinear damped wave equation to the nonlinear heat equation

Takahisa Inui, Shuji Machihara

摘要:

本文考虑一类具有幂型非线性项的阻尼波动方程到相应的热传导方程的奇异极限问题。我们称我们的奇异极限问题为非时滞极限。我们的证明是基于第二作者Nakanishi和Ozawa(2002)、Nakanishi(2002)以及Masmoudi和Nakanishi(2002)关于从非线性Klein-Gordon方程到非线性薛定谔方程的非相对论极限的论证。由于耗散性质的存在,对于非时滞极限问题,我们可以得到比非相对论极限问题更好的结果。更准确地说,我们得到了$L^2$ -范数的更好的收敛速度,我们也得到了在$L^2$ -超临界情况下的无时滞极限的全局一致收敛性。

英文摘要:

We consider a singular limit problem from the damped wave equation with a power type nonlinearity to the corresponding heat equation. We call our singular limit problem non-delay limit. Our proofs are based on the argument for non-relativistic limit from the nonlinear Klein-Gordon equation to the nonlinear Schrödinger equation by the second author, Nakanishi, and Ozawa (2002), Nakanishi (2002), and Masmoudi and Nakanishi (2002). We can obtain better results for the non-delay limit problem than that for the non-relativistic limit problem due to the dissipation property. More precisely, we get the better convergence rate of the $L^2$-norm and we also obtain the global-in-time uniform convergence of the non-delay limit in the $L^2$-supercritical case.

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