SourceDetMamba: A Graph-aware State Space Model for Source Detection in Sequential Hypergraphs
This work addresses source detection for rumor control in social networks, representing an incremental improvement with a novel hybrid method.
The paper tackled the problem of identifying rumor origins in social networks by proposing SourceDetMamba, a graph-aware state space model for source detection in sequential hypergraphs, which outperformed state-of-the-art methods on eight datasets.
Source detection on graphs has demonstrated high efficacy in identifying rumor origins. Despite advances in machine learning-based methods, many fail to capture intrinsic dynamics of rumor propagation. In this work, we present SourceDetMamba: A Graph-aware State Space Model for Source Detection in Sequential Hypergraphs, which harnesses the recent success of the state space model Mamba, known for its superior global modeling capabilities and computational efficiency, to address this challenge. Specifically, we first employ hypergraphs to model high-order interactions within social networks. Subsequently, temporal network snapshots generated during the propagation process are sequentially fed in reverse order into Mamba to infer underlying propagation dynamics. Finally, to empower the sequential model to effectively capture propagation patterns while integrating structural information, we propose a novel graph-aware state update mechanism, wherein the state of each node is propagated and refined by both temporal dependencies and topological context. Extensive evaluations on eight datasets demonstrate that SourceDetMamba consistently outperforms state-of-the-art approaches.