arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.04262cs.CCmath.CO
收藏

基于通信复杂性的图参数逼近下界

Lower Bounds for Approximating Graph Parameters via Communication Complexity

Talya Eden, Will Rosenbaum

摘要:

在一项著名的工作中,Blais、Brody和Matulef开发了一种通过降低通信复杂性来证明属性测试下限的技术。他们的工作集中于测试函数的性质,并产生了新的下界以及对已知下界的简化分析。在这里,我们进一步推广Blais等人的方法来分析图参数估计问题的查询复杂性。特别是,我们的技术从图的表示中提取下限参数,使其能够与任何查询类型一起工作。我们说明了我们的技术,提供新的更简单的证明以前已知的紧下界的查询复杂度的几个图的问题:估计在一个图形中的边缘的数量,采样边缘从一个几乎均匀的分布,估计三角形的数量(更一般地说,$r$ -团)在一个图形,并估计的时刻图的度分布。我们还证明了新的下界估计图的边连通性和估计图中的任何固定子图的实例数。我们发现,下界估计的三角形和边缘连接的数量也持有严格更强的计算模型,允许访问均匀随机的边缘样本。

英文摘要:

In a celebrated work, Blais, Brody, and Matulef developed a technique for proving property testing lower bounds via reductions from communication complexity. Their work focused on testing properties of functions, and yielded new lower bounds as well as simplified analyses of known lower bounds. Here, we take a further step in generalizing the methodology of Blais et al. to analyze the query complexity of graph parameter estimation problems. In particular, our technique decouples the lower bound arguments from the representation of the graph, allowing it to work with any query type. We illustrate our technique by providing new simpler proofs of previously known tight lower bounds for the query complexity of several graph problems: estimating the number of edges in a graph, sampling edges from an almost-uniform distribution, estimating the number of triangles (and more generally, $r$-cliques) in a graph, and estimating the moments of the degree distribution of a graph. We also prove new lower bounds for estimating the edge connectivity of a graph and estimating the number of instances of any fixed subgraph in a graph. We show that the lower bounds for estimating the number of triangles and edge connectivity also hold in a strictly stronger computational model that allows access to uniformly random edge samples.

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。

↑