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arXiv 2006.07642stat.MLcs.LGmath.STstat.TH
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流形上回归问题的样本复杂性和有效维数

Sample complexity and effective dimension for regression on manifolds

School of Electrical and Computer Engineering(电气与计算机工程学院);Georgia Institute of Technology(佐治亚理工学院)

Andrew McRae, Justin Romberg, Mark Davenport

摘要:

本文利用再生核Hilbert空间方法研究了流形上的回归问题。流形模型出现在各种各样的现代机器学习问题中,我们的目标是帮助理解利用流形结构的各种隐式和显式降维方法的有效性。我们的第一个关键贡献是建立一个新的非渐近版本的外尔定律从微分几何。由此,我们能够证明流形上的某些光滑函数空间实际上是有限维的,其复杂性根据流形维度而不是任何环境数据维度进行缩放。最后,我们表明,给定(潜在的噪声)函数值均匀随机在一个流形上,一个内核回归估计(来自流形的谱分解)产生最小最优的误差范围,由有效尺寸控制。

英文摘要:

We consider the theory of regression on a manifold using reproducing kernel Hilbert space methods. Manifold models arise in a wide variety of modern machine learning problems, and our goal is to help understand the effectiveness of various implicit and explicit dimensionality-reduction methods that exploit manifold structure. Our first key contribution is to establish a novel nonasymptotic version of the Weyl law from differential geometry. From this we are able to show that certain spaces of smooth functions on a manifold are effectively finite-dimensional, with a complexity that scales according to the manifold dimension rather than any ambient data dimension. Finally, we show that given (potentially noisy) function values taken uniformly at random over a manifold, a kernel regression estimator (derived from the spectral decomposition of the manifold) yields minimax-optimal error bounds that are controlled by the effective dimension.

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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