Mass, Capacitary Functions, and the Mass-to-Capacity Ratio

Mass, Capacitary Functions, and the Mass-to-Capacity Ratio
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质量、电容函数和质量容量比

DOI:
10.1007/s42543-023-00071-7
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发表时间:
2023
期刊:
Peking Mathematical Journal
影响因子:
--
通讯作者:
Miao, Pengzi
Miao, Pengzi
中科院分区:
--
文献类型:
--
作者:
Miao, Pengzi

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我们研究 ADM 质量、正调和函数和非负标量曲率的渐近平坦 3 流形上的边界容量之间的联系。我们从通过正调和函数检测质量的新公式开始。然后,假设流形具有简单的拓扑,我们推导出一系列单调量和几何不等式。作为第一个应用,我们观察了 3 维黎曼正质量定理的几个附加证明。一项证明引出了新的充分条件,表明通过分隔边界 和 的区域的几何形状,质量具有正性。这种条件的一个特殊情况表明,如果包围边界的区域具有相对较小的体积,则质量为正。作为进一步的应用,我们获得了质量容量比的积分恒等式。我们还将旋转对称球体之外的史瓦西流形上的不等式推广为等式。除此之外,我们证明质量容量比总是低于 1 减去边界的归一化威尔莫尔泛函的平方根。在这些发现的推动下,我们对在 Bartnik 准局部质量的背景下满足质量容量比约束的流形进行了研究。
We study connections among the ADM mass, positive harmonic functions, and capacity of the boundary on asymptotically flat 3-manifolds of nonnegative scalar curvature. We start with new formulae detecting the mass via positive harmonic functions. Then we derive a family of monotone quantities and geometric inequalities assuming the manifold has simple topology. As a first application, we observe several additional proofs of the 3-dimensional Riemannian positive mass theorem. One proof leads to new, sufficient conditions implying positivity of the mass via-geometry of regions separating the boundary and. A special case of such conditions shows if a region enclosing the boundary has relative small volume, then the mass is positive. As further applications, we obtain integral identities for the mass-to-capacity ratio. We also promote the inequalities to become equality on Schwarzschild manifolds outside rotationally symmetric spheres. Among other things, we show the mass-to-capacity ratio is always bounded below by one minus the square root of the normalized Willmore functional of the boundary. Prompted by these findings, we carry out a study of manifolds satisfying a constraint on the mass-to-capacity ratio in the context of the Bartnik quasi-local mass.
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