arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1705.04565math.STmath.DGstat.TH
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流形的可达性估计

Estimating the Reach of a Manifold

Eddie Aamari, Jisu Kim, Frédéric Chazal, Bertrand Michel, Alessandro Rinaldo, Larry Wasserman

摘要:

流形估计中的各种问题都使用了一个称为到达的量,用$τ\_M$表示,它是流形正则性的度量。本文是首次探讨如何估计可达性的问题。首先,我们通过近似的角度来研究到达的几何形状。我们得到了关于无边界子流形可达性的新的几何结果。在已知切空间的框架下,提出了$τ\_{M}$的估计量$\hatτ$,并给出了估计其有效性的界.在i.i.d.的情况下。随机点云$\mathbb{X}\_{n}$,$\hatτ(\mathbb{X}\_{n})$显示,实现均匀的预期损失界超过$\mathcal{C}^3$ -类模型。最后,我们得到的上界和下界的极小极大率估计的范围。

英文摘要:

Various problems in manifold estimation make use of a quantity called the reach, denoted by $τ\_M$, which is a measure of the regularity of the manifold. This paper is the first investigation into the problem of how to estimate the reach. First, we study the geometry of the reach through an approximation perspective. We derive new geometric results on the reach for submanifolds without boundary. An estimator $\hatτ$ of $τ\_{M}$ is proposed in a framework where tangent spaces are known, and bounds assessing its efficiency are derived. In the case of i.i.d. random point cloud $\mathbb{X}\_{n}$, $\hatτ(\mathbb{X}\_{n})$ is showed to achieve uniform expected loss bounds over a $\mathcal{C}^3$-like model. Finally, we obtain upper and lower bounds on the minimax rate for estimating the reach.

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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