Papers › MANTRA: Temporal Betweenness Centrality Approximation through Sampling

MANTRA: Temporal Betweenness Centrality Approximation through Sampling

17 Apr 2023arXiv:2304.08356links table onlyarchive 2025-07-28

Antonio Cruciani

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We present MANTRA, a framework for approximating the temporal betweenness centrality of all nodes in a temporal graph. Our method can compute probabilistically guaranteed high-quality temporal betweenness estimates (of nodes and temporal edges) under all the feasible temporal path optimalities, presented in the work of Bu{\ss} et al. (KDD, 2020). We provide a sample-complexity analysis of our method and speed up the temporal betweenness computation using a state-of-the-art progressive sampling approach based on Monte Carlo Empirical Rademacher Averages. Additionally, we provide an efficient sampling algorithm to approximate the temporal diameter, average path length, and other fundamental temporal graph characteristic quantities within a small error ε with high probability. The running time of such approximation algorithm is 𝒪̃(logn/ε²·|ℰ|), where n is the number of nodes and |ℰ| is the number of temporal edges in the temporal graph. We support our theoretical results with an extensive experimental analysis on several real-world networks and provide empirical evidence that the MANTRA framework improves the current state of the art in speed, sample size, and required space while maintaining high accuracy of the temporal betweenness estimates.

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