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arXiv 2201.01328math.DGgr-qc
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不完备流形的密度定理和正质量定理

Density and positive mass theorems for incomplete manifolds

Dan A. Lee, Martin Lesourd, Ryan Unger

摘要:

对于流形的一个杰出的渐近平坦的结束,我们证明了一个密度定理,产生调和渐近的杰出的结束,同时允许点的不完整性(或负数量曲率)远离这一端。我们用它来改进正质量定理的“定量”版本(在维度$3\leq n\leq 7$中),由最后两位命名的作者获得,S.- T. Yau [LUY 21],其中较强的衰变被假定在杰出的结束。基于MOTS和$μ$ -泡之间的关系以及我们最近关于有边界时空正质量定理的工作[LLU 21],我们给出了这个定理的另一种证明.

英文摘要:

For manifolds with a distinguished asymptotically flat end, we prove a density theorem which produces harmonic asymptotics on the distinguished end, while allowing for points of incompleteness (or negative scalar curvature) away from this end. We use this to improve the "quantitative" version of the positive mass theorem (in dimensions $3\leq n\leq 7$), obtained by the last two named authors with S.-T. Yau [LUY21], where stronger decay was assumed on the distinguished end. We also give an alternative proof of this theorem based on a relationship between MOTS and $μ$-bubbles and our recent work on the spacetime positive mass theorem with boundary [LLU21].

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