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arXiv 2403.02501math.DGgr-qcmath-phmath.MP
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具有标量曲率下界的紧致流形的边界行为与环面的静态准局部质量

Boundary Behavior of Compact Manifolds With Scalar Curvature Lower Bounds and Static Quasi-Local Mass of Tori

Aghil Alaee, Pei-Ken Hung, Marcus Khuri

AI总结:

本文将 Shi-Tam 边界平均曲率不等式推广至负曲率背景中的环面,借助第二边界的捕获条件证明静态 Brown-York 质量正性及 Penrose 型不等式。

摘要:

Shi 和 Tam 的一个经典结果表明:若一个具有正 Gauss 曲率和平均曲率的 2-球面界定了一个具有非负标量曲率的紧致 3-流形,则其总平均曲率必不大于其等距嵌入 Euclid 3-空间所得的总平均曲率,且等号仅对该参考流形中的区域成立。我们将此结果推广到 Gauss 曲率大于 $-1$ 的 2-环面;这些环面界定一个标量曲率不小于 $-6$ 的紧致 3-流形,并且该流形至少还有另一个满足“捕获条件”的边界分支。结论是:其总加权平均曲率不大于等距嵌入 Kottler 流形所得的总加权平均曲率,且等号仅对该空间中的区域成立。文中给出的例子表明,存在第二个边界分支这一假设不可去除。该结果给出了环面的静态 Brown-York 质量的正质量定理,类似于标准 Brown-York 质量的 Shi-Tam 正性,并且代表了非球面曲面的首个此类准局部质量正性结果。此外,我们在此设定下证明了一个 Penrose 型不等式。

英文摘要:

A classic result of Shi and Tam states that a 2-sphere of positive Gauss and mean curvature bounding a compact 3-manifold with nonnegative scalar curvature, must have total mean curvature not greater than that of the isometric embedding into Euclidean 3-space, with equality only for domains in this reference manifold. We generalize this result to 2-tori of Guass curvature greater than $-1$, which bound a compact 3-manifold having scalar curvature not less than $-6$ and at least one other boundary component satisfying a 'trapping condition'. The conclusion is that the total weighted mean curvature is not greater than that of an isometric embedding into the Kottler manifold, with equality only for domains in this space. Examples are given to show that the assumption of a secondary boundary component cannot be removed. The result gives a positive mass theorem for the static Brown-York mass of tori, in analogy to the Shi-Tam positivity of the standard Brown-York mass, and represents the first such quasi-local mass positivity result for non-spherical surfaces. Furthermore, we prove a Penrose-type inequality in this setting.

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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