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arXiv 0812.4001math.APcs.NAgr-qcmath.NA
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多空间变量中相对论欧拉方程的一个对称化

A symmetrization of the relativistic Euler equations in several spatial variables

Department of Mathematics, City University of Hong Kong(香港城市大学数学系)

Philippe G. LeFloch, Seiji Ukai

AI总结:

针对闵可夫斯基时空中含真空态的相对论可压缩流体欧拉方程,提出一种新的对称化方法,并证明在速度有界且远离光速的条件下,含真空态解的局部存在性及紧支撑解支撑集不随时间扩张的性质。

摘要:

我们考虑在多空间变量的闵可夫斯基时空中演化的相对论可压缩流体的欧拉方程。我们提出一种新的对称化,该对称化对于包含真空态的解有意义,并且例如适用于紧支撑解的情形,这对于模拟恒星动力学很重要。然后,基于这些对称化并假设速度不超过某个阈值且保持远离光速,我们推导出包含真空态解的局部存在性结果。我们还观察到紧支撑解的支撑集不随时间扩张。

英文摘要:

We consider the Euler equations governing relativistic compressible fluids evolving in the Minkowski spacetime with several spatial variables. We propose a new symmetrization which makes sense for solutions containing vacuum states and, for instance, applies to the case of compactly supported solutions, which are important to model star dynamics. Then, relying on these symmetrization and assuming that the velocity does not exceed some threshold and remains bounded away from the light speed, we deduce a local-in-time existence result for solutions containing vacuum states. We also observe that the support of compactly supported solutions does not expand as time evolves.

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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