Universal consistency of the k-NN rule in metric spaces and Nagata dimension

Universal consistency of the k-NN rule in metric spaces and Nagata dimension
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度量空间和Nagata维中k-NN规则的普遍一致性

DOI:
10.1051/ps/2020018
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发表时间:
2020
期刊:
ESAIM: Probability and Statistics
影响因子:
--
通讯作者:
Pestov Vladimir G.
Pestov Vladimir G.
中科院分区:
--
文献类型:
--
作者:
Collins Benoit;Kumari Sushma;Pestov Vladimir G.

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在Nagata意义下,最近邻学习规则(在均匀距离条件下)在σ-有限维度量空间X中是普适一致的. Cérou和Guyader(2006)指出了这一点,作为他们主要结果的结果,结合D. Preiss(1971)(Assouad和Quentin de Gromard(2006)详细阐述)。我们证明了在有限维欧氏空间中,可以沿着与Charles J. Stone(1977)关于k-NN分类器的泛相容性定理相同的思路,给出一个沿着直接的证明.推广是不平凡的,因为距离的关系是更普遍的非欧几里德设置,并在路上,我们调查的度量和限制的石头参数的相关几何性质,通过构建各种例子。
Theknearest neighbour learning rule (under the uniform distance tie breaking) is universally consistent in every metric spaceXthat is sigma-finite dimensional in the sense of Nagata. This was pointed out by Cérou and Guyader (2006) as a consequence of the main result by those authors, combined with a theorem in real analysis sketched by D. Preiss (1971) (and elaborated in detail by Assouad and Quentin de Gromard (2006)). We show that it is possible to give a direct proof along the same lines as the original theorem of Charles J. Stone (1977) about the universal consistency of thek-NN classifier in the finite dimensional Euclidean space. The generalization is non-trivial because of the distance ties being more prevalent in the non-Euclidean setting, and on the way we investigate the relevant geometric properties of the metrics and the limitations of the Stone argument, by constructing various examples.
关于表征dim_??_n度量空间的特殊度量
DOI: 10.3792/pja/1195523056
发表时间: 1963
期刊: --
影响因子: --
作者:
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