Nearly Optimal Clustering Risk Bounds for Kernel K-Means

9 Mar 2020Yong LiuLizhong DingWeiping Wang

In this paper, we study the statistical properties of kernel $k$-means and obtain a nearly optimal excess clustering risk bound, substantially improving the state-of-art bounds in the existing clustering risk analyses. We further analyze the statistical effect of computational approximations of the Nystr\"{o}m kernel $k$-means, and prove that it achieves the same statistical accuracy as the exact kernel $k$-means considering only $\Omega(\sqrt{nk})$ Nystr\"{o}m landmark points... (read more)

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