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cs.SI2026
JECHO: Scalable Echo Chamber Detection via Jaccard-based Homophily and Seed Expansion
Ali Safarpoor Dehkordi, Atsushi Miyauchi, Francesco Bonchi +1
Detecting echo chambers is critical for understanding and limiting negative social phenomena, such as online polarization, misinformation, and conspiracy theory diffusion. However,…
cs.SI2025
Minimizing Polarization and Disagreement in the Friedkin-Johnsen Model with Unknown Innate Opinions
Federico Cinus, Atsushi Miyauchi, Yuko Kuroki +1
The bulk of the literature on opinion optimization in social networks adopts the Friedkin-Johnsen (FJ) opinion dynamics model, in which the innate opinions of all nodes are known:…
cs.SI2024
Local Centrality Minimization with Quality Guarantees
Atsushi Miyauchi, Lorenzo Severini, Francesco Bonchi
Centrality measures, quantifying the importance of vertices or edges, play a fundamental role in network analysis. To date, triggered by some positive approximability results, a la…