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arXiv 2109.14528cs.DScs.LG
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基于稀疏-密集分解的次线性时空相关聚类算法

Sublinear Time and Space Algorithms for Correlation Clustering via Sparse-Dense Decompositions

Rutgers University(罗格斯大学)

Sepehr Assadi, Chen Wang

摘要:

我们提出了一种新的方法来解决(最小分歧)的相关聚类,结果在次线性算法与高效的时间和空间复杂度为这个问题。特别是,我们获得了以下算法的$n$ -顶点$(+/-)$ -标记的图形$G$:-一个次线性时间算法,以高概率返回一个恒定的近似聚类的$G$在$O(n\log^2{n})$时间假设访问的邻接列表的$(+)$ -标记的边缘$G$(这几乎是二次方快于甚至读取输入一次)。以前,没有次线性时间算法是已知的这个问题的任何乘法近似保证。--半流算法,其以高概率返回$G$在$O(n\log{n})$空间中的恒定近似聚类和在图$G$的边缘上的单次通过(该存储器几乎是输入大小的二次方)。以前,没有一个单遍算法与$o(n^2)$空间是已知的这个问题的任何近似保证。我们的方法的主要成分是一个新的连接到稀疏密集图分解,广泛用于图着色文献。据我们所知,这种连接是这些分解超出图着色的第一个应用,特别是相关聚类问题,可以独立的兴趣。

英文摘要:

We present a new approach for solving (minimum disagreement) correlation clustering that results in sublinear algorithms with highly efficient time and space complexity for this problem. In particular, we obtain the following algorithms for $n$-vertex $(+/-)$-labeled graphs $G$: -- A sublinear-time algorithm that with high probability returns a constant approximation clustering of $G$ in $O(n\log^2{n})$ time assuming access to the adjacency list of the $(+)$-labeled edges of $G$ (this is almost quadratically faster than even reading the input once). Previously, no sublinear-time algorithm was known for this problem with any multiplicative approximation guarantee. -- A semi-streaming algorithm that with high probability returns a constant approximation clustering of $G$ in $O(n\log{n})$ space and a single pass over the edges of the graph $G$ (this memory is almost quadratically smaller than input size). Previously, no single-pass algorithm with $o(n^2)$ space was known for this problem with any approximation guarantee. The main ingredient of our approach is a novel connection to sparse-dense graph decompositions that are used extensively in the graph coloring literature. To our knowledge, this connection is the first application of these decompositions beyond graph coloring, and in particular for the correlation clustering problem, and can be of independent interest.

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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