Computing maximal cliques in link streams

A link stream is a collection of triplets (t, u, v) indicating that an interaction occurred between u and v at time t. We generalize the classical notion of cliques in graphs to such link streams: for a given ∆, a ∆-clique is a set of nodes and a time interval such that all pairs of nodes in this set interact at least once during each sub-interval of duration ∆. We propose an algorithm to enumerate all maximal (in terms of nodes or time interval) cliques of a link stream, and illustrate its practical relevance on a real-world contact trace.

• Type: Journal
• Year: 2016
• Where: TCS
• Authors: Jordan Viard, Matthieu Latapy, Clémence Magnien
• Keywords: TCS 2016, Theoretical Computer Science