Multi-Relational Structural Entropy

Yuwei Cao, Hao Peng, Angsheng Li, Chenyu You, Zhifeng Hao, Philip S. Yu

Keywords: Multi-relational Structural Entropy, graph entropy, multi-relational graphs, node clustering

TL;DR: We introduce Multi-Relational Structural Entropy (MrSE), the first metric designed to quantify the structural information within multi-relational graphs.

Abstract: Structural Entropy (SE) measures the structural information contained in a graph. Minimizing or maximizing SE helps to reveal or obscure the intrinsic structural patterns underlying graphs in an interpretable manner, finding applications in various tasks driven by networked data. However, SE ignores the heterogeneity inherent in the graph relations, which is ubiquitous in modern networks. In this work, we extend SE to consider heterogeneous relations and propose the first metric for multi-relational graph structural information, namely, Multi-relational Structural Entropy (MrSE). To this end, we first cast SE through the novel lens of the stationary distribution from random surfing, which readily extends to multi-relational networks by considering the choices of both nodes and relation types simultaneously at each step. The resulting MrSE is then optimized by a new greedy algorithm to reveal the essential structures within a multi-relational network. Experimental results highlight that the proposed MrSE offers a more insightful interpretation of the structure of multi-relational graphs compared to SE. Additionally, it enhances the performance of two tasks that involve real-world multi-relational graphs, including node clustering and social event detection.

List Of Authors: Cao, Yuwei and Peng, Hao and Li, Angsheng and You, Chenyu and Hao, Zhifeng and Yu, Philip S

Code Url: https://github.com/YuweiCao-UIC/MrSE

Submission Number: 526