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arXiv 1811.02463math.AP
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连续性方程的对数估计

Logarithmic estimates for continuity equations

Maria Colombo, Gianluca Crippa, Stefano Spirito

摘要:

这份简短说明的目的有两个。首先,我们给出了一个草图的证明最近的结果证明了作者在文件[科伦坡,克里帕,和Spirito,计算。变种偏微分方程2015]关于具有无界阻尼系数的连续性方程重正化解的存在唯一性。第二,我们展示了如何在[科伦坡,克里帕,和Spirito,计算。变种偏微分方程2015]可用于提供[Clop,Jiang,Mateu,and Orobitg,Calc.变种偏微分方程2016],[Desjardins,Comm. Partial Diff.当量1996]和[Mucha,J.微分方程2010],其中向量场的散度的有界性的通常要求已经放宽到指数可积函数的各种设置。

英文摘要:

The aim of this short note is twofold. First, we give a sketch of the proof of a recent result proved by the authors in the paper [Colombo, Crippa, and Spirito, Calc. Var. Partial Differential Equations 2015] concerning existence and uniqueness of renormalized solutions of continuity equations with unbounded damping coefficient. Second, we show how the ideas in [Colombo, Crippa, and Spirito, Calc. Var. Partial Differential Equations 2015] can be used to provide an alternative proof of the result in [Clop, Jiang, Mateu, and Orobitg, Calc. Var. Partial Differential Equations 2016], [Desjardins, Comm. Partial Diff. Eq. 1996], and [Mucha, J. Differential Equations 2010] where the usual requirement of boundedness of the divergence of the vector field has been relaxed to various settings of exponentially integrable functions.

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