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arXiv 2203.01984math.DGgr-qcmath.AP
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时空正质量定理的相等情形

The case of equality for the spacetime positive mass theorem

Sven Hirsch, Yiyue Zhang

摘要:

时空正质量定理的刚性表明,满足主能量条件且质量为零的初始数据集$(M,g,k)$可以等距嵌入闵可夫斯基空间。这是由Beig-Chruzzciel和Huang-Lee在能量和动量密度$μ$和$J$的附加衰变假设下建立的。在本说明中,我们给出了一个新的和基本的证明,在3维,删除这些额外的衰变假设。我们的论证使用时空调和函数和刘维尔定理。我们还提供了一个替代的证明的基础上杀死发展的$(M,g,k)$。

英文摘要:

The rigidity of the spacetime positive mass theorem states that an initial data set $(M,g,k)$ satisfying the dominant energy condition with vanishing mass can be isometrically embedded into Minkowski space. This has been established by Beig-Chruściel and Huang-Lee under additional decay assumptions for the energy and momentum densities $μ$ and $J$. In this note we give a new and elementary proof in dimension 3 which removes these additional decay assumptions. Our argument uses spacetime harmonic functions and Liouville's theorem. We also provide an alternative proof based on the Killing development of $(M,g,k)$.

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