The Power of Side-Information in Subgraph Detection
The Power of Side-Information in Subgraph Detection
复制标题
子图检测中辅助信息的力量
DOI:
10.1109/tsp.2017.2786266
复制
发表时间:
2016
影响因子:
5.4
通讯作者:
R. Sundaresan
中科院分区:
文献类型:
--
作者:
Arun Kadavankandy;Konstantin Avrachenkov;L. Cottatellucci;R. Sundaresan
In this paper, we tackle the problem of hidden community detection. We consider belief propagation (BP) applied to the problem of detecting a hidden Erdős-Rényi (ER) graph embedded in a larger and sparser ER graph, in the presence of side-information. We derive two related algorithms based on BP to perform subgraph detection in the presence of two kinds of side-information. The first variant of side-information consists of a set of nodes, called cues, known to be from the subgraph. The second variant of side-information consists of a set of nodes that are cues with a given probability. It was shown in past works that BP without side-information fails to detect the subgraph correctly when a so-called effective signal-to-noise ratio parameter falls below a threshold. In contrast, in the presence of nontrivial side-information, we show that the BP algorithm achieves asymptotically zero error for any value of a suitably defined phase-transition parameter. We validate our results on synthetic datasets and a few real world networks.
影响因子:
1
作者:
Hajek, Bruce;Wu, Yihong;Xu, Jiaming
通讯作者:
Xu, Jiaming