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arXiv 2302.08248math.AP
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非线性扩散方程的非局部逼近

Nonlocal approximation of nonlinear diffusion equations

José Antonio Carrillo, Antonio Esposito, Jeremy Sheung-Him Wu

AI总结:

本文通过非局部偏微分方程的梯度流极限逼近退化非线性扩散方程,利用Jordan-Kinderlehrer-Otto格式构造弱解,覆盖慢扩散多孔介质方程,并给出定性粒子逼近。

摘要:

我们证明了退化非线性扩散方程可以渐近地作为一类非局部偏微分方程的极限而获得。这些非局部方程是通过逼近内能的相互作用类能量的梯度流得到的。我们利用$2$-Wasserstein梯度流背景下的Jordan-Kinderlehrer-Otto格式,构造了弱测度解序列的(子)序列极限作为弱解。我们的策略能够覆盖多孔介质方程,适用于一般慢扩散情形,扩展了文献中的先前结果。作为我们分析的副产品,我们提供了一种定性的粒子逼近。

英文摘要:

We show that degenerate nonlinear diffusion equations can be asymptotically obtained as a limit from a class of nonlocal partial differential equations. The nonlocal equations are obtained as gradient flows of interaction-like energies approximating the internal energy. We construct weak solutions as the limit of a (sub)sequence of weak measure solutions by using the Jordan-Kinderlehrer-Otto scheme from the context of $2$-Wasserstein gradient flows. Our strategy allows to cover the porous medium equation, for the general slow diffusion case, extending previous results in the literature. As a byproduct of our analysis, we provide a qualitative particle approximation.

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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