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arXiv 1602.07424cs.DScs.DB
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TRIÈST:在固定内存大小的全动态流中计算局部和全局三角形

TRIÈST: Counting Local and Global Triangles in Fully-dynamic Streams with Fixed Memory Size

Lorenzo De Stefani, Alessandro Epasto, Matteo Riondato, Eli Upfal

摘要:

我们提出了TRIBUST,一套单通道流算法来计算全局和局部(即,关联到每个顶点)的三角形的数量表示为边插入和删除的对抗流的全动态图。我们的算法使用水库采样及其变种,以利用用户指定的内存空间在任何时候。这与使用难以选择的参数(例如,固定的采样概率),并且不保证它们将使用的存储器量。我们展示了这些数量的估计和新的浓度范围的方差的全面分析。我们在非常大的图上的实验结果表明,TRIBUIST在准确性上优于最先进的方法,并且具有较小的更新时间。

英文摘要:

We present TRIÈST, a suite of one-pass streaming algorithms to compute unbiased, low-variance, high-quality approximations of the global and local (i.e., incident to each vertex) number of triangles in a fully-dynamic graph represented as an adversarial stream of edge insertions and deletions. Our algorithms use reservoir sampling and its variants to exploit the user-specified memory space at all times. This is in contrast with previous approaches which use hard-to-choose parameters (e.g., a fixed sampling probability) and offer no guarantees on the amount of memory they will use. We show a full analysis of the variance of the estimations and novel concentration bounds for these quantities. Our experimental results on very large graphs show that TRIÈST outperforms state-of-the-art approaches in accuracy and exhibits a small update time.

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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