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arXiv 2410.01616math.AP
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广义相对论中自由边界正压流体模型的适定性

Well-posedness for the free boundary barotropic fluid model in general relativity

Zeming Hao, Wei Huo, Shuang Miao

AI总结:

本文研究广义相对论中带自由边界的正压流体与 Einstein 方程耦合模型,利用平行标架分解、内–边界耦合波动方程和 Bianchi 方程建立 Sobolev 适定性,并推广到一般状态方程与非零涡量。

摘要:

在广义相对论框架下,一般正压流体的动力学与支配底层时空结构的 Einstein 方程相耦合。我们建立了该带自由边界模型在 Sobolev 空间中的先验估计与适定性。在由流体速度平行输运的标架内,我们分解流体量与几何量。流体分量通过一个内–边界耦合的波动方程进行估计,而几何量则通过 Bianchi 方程加以分析。与先前工作相比,本文结果允许一般状态方程和非零涡量。

英文摘要:

In the framework of general relativity, the dynamics of a general barotropic fluid are coupled to the Einstein equations, which govern the structure of the underlying spacetime. We establish a priori estimates and well-posedness in Sobolev spaces for this model with a free boundary. Within the frame parallel-transported by the fluid velocity, we decompose the fluid and geometric quantities. The fluid components are estimated via a coupled interior-boundary wave equation, while the geometric quantities are analyzed through the Bianchi equations. Compared to a previous work, the results in present paper allow general equations of state and non-zero vorticities.

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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