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arXiv 2109.08683math.AP
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Burgers方程有限熵解的广义特征

Generalized Characteristics for Finite Entropy Solutions of Burgers' Equation

Andres A. Contreras Hip, Xavier Lamy, Elio Marconi

摘要:

本文证明了Burgers方程\[ \partial_t u +\partial_x \frac{u^2}{2} =0, \]的弱解(不一定是熵解)的广义特征的存在性,其熵产生是带号测度.这样的解决方案出现与相互作用粒子系统的流体动力学极限的大偏差原则。目前的工作允许删除技术跟踪假设在最近的结果由两个第一作者关于$L^2$稳定性的熵冲击之间的非熵的解决方案。证明依赖于拉格朗日表示的解决方案的hypograph,最近由第三作者。特别地,我们证明了一个分解公式的熵通量通过一个给定的超曲面,这是有效的一般多维标量守恒律。

英文摘要:

We prove the existence of generalized characteristics for weak, not necessarily entropic, solutions of Burgers' equation \[ \partial_t u +\partial_x \frac{u^2}{2} =0, \] whose entropy productions are signed measures. Such solutions arise in connection with large deviation principles for the hydrodynamic limit of interacting particle systems. The present work allows to remove a technical trace assumption in a recent result by the two first authors about the $L^2$ stability of entropic shocks among such non-entropic solutions. The proof relies on the Lagrangian representation of a solution's hypograph, recently constructed by the third author. In particular, we prove a decomposition formula for the entropy flux across a given hypersurface, which is valid for general multidimensional scalar conservation laws.

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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