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arXiv 1709.01037cs.CG
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低复杂度模型的持久同源性

Persistent homology for low-complexity models

Martin Lotz

摘要:

我们表明,最近的结果,利用数据的结构特性的随机降维方案,可以应用在持久的同源性的背景下。在压缩感知的精神中,降维是由与数据集相关联的结构的高斯宽度而不是其大小来确定的,并且可以有效地计算这样的降维。我们进一步将高斯宽度与有限度量空间的双倍维数联系起来,这出现在对近似持久同调的其他方法的复杂性的研究中。因此,我们可以从字面上用与数据结构相关的内在维度概念来替换环境维度。

英文摘要:

We show that recent results on randomized dimension reduction schemes that exploit structural properties of data can be applied in the context of persistent homology. In the spirit of compressed sensing, the dimension reduction is determined by the Gaussian width of a structure associated to the data set, rather than its size, and such a reduction can be computed efficiently. We further relate the Gaussian width to the doubling dimension of a finite metric space, which appears in the study of the complexity of other methods for approximating persistent homology. We can therefore literally replace the ambient dimension by an intrinsic notion of dimension related to the structure of the data.

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