论文标题
动态完整签名图的在线关联聚类
Online Correlation Clustering for Dynamic Complete Signed Graphs
论文作者
论文摘要
在完整签名图的相关聚类问题中,输入是一个完整的签名图,边缘加权为$+1 $(表示将这对将这对放在同一群集中)或$ -1 $(建议将这对顶点放在单独的群集中),并且目标是将这些份额组成的网络集群组成这些建议,这些推荐是这些推荐的数量。 在本文中,我们考虑了动态完整签名图的相关群集的问题,其中(1)可以添加或删除顶点,并且(2)可以翻转边缘的符号。在拟议的在线方案中,使用用于相关聚类的离线近似算法。根据作者的知识,这是第一个用于动态图的在线算法,该算法允许完整的图形编辑操作。 对所提出的方法进行了严格的分析,并将其与基线方法进行了比较,该方法在每个时间步骤中运行原始离线算法。我们的结果表明,动态操作对相邻的顶点有局部影响,我们采用此区域来减少基线运行时间的依赖性,以降低$ g_t $中所有顶点的求和,在时间步长$ t $上应用图表编辑操作后,图形对更改的角度(例如,两个端点的端点)的求和度(例如,cl的数字)和数字的数字是数字的数字。此外,所需的工作内存将减少为修改后的边缘端点程度的总和,而不是图中的顶点总数。
In the correlation clustering problem for complete signed graphs, the input is a complete signed graph with edges weighted as $+1$ (denote recommendation to put this pair in the same cluster) or $-1$ (recommending to put this pair of vertices in separate clusters) and the target is to cluster the set of vertices such that the number of disagreements with these recommendations is minimized. In this paper, we consider the problem of correlation clustering for dynamic complete signed graphs where (1) a vertex can be added or deleted, and (2) the sign of an edge can be flipped. In the proposed online scheme, the offline approximation algorithm in [CALM+21] for correlation clustering is used. Up to the author's knowledge, this is the first online algorithm for dynamic graphs which allows a full set of graph editing operations. The proposed approach is rigorously analyzed and compared with a baseline method, which runs the original offline algorithm on each time step. Our results show that the dynamic operations have local effects on the neighboring vertices and we employ this locality to reduce the dependency of the running time in the Baseline to the summation of the degree of all vertices in $G_t$, the graph after applying the graph edit operation at time step $t$, to the summation of the degree of the changing vertices (e.g. two endpoints of an edge) and the number of clusters in the previous time step. Moreover, the required working memory is reduced to the square of the summation of the degree of the modified edge endpoints rather than the total number of vertices in the graph.