activity
20092026
most citedPolitical Discourse on Social Media: Echo Chambers, Gatekeepers, and the Price of Bipartisanship

79 citations · 541 across the 84 of their papers we have counts for

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41 papers · 1 filter

cs.SI2025

Fairness-aware PageRank via Edge Reweighting

Honglian Wang, Haoyun Chen, Aristides Gionis

Link-analysis algorithms, such as PageRank, are instrumental in understanding the structural dynamics of networks by evaluating the importance of individual vertices based on their…

cs.SI2025

DSP: A Statistically-Principled Structural Polarization Measure

Giulia Preti, Matteo Riondato, Aristides Gionis +1

Social and information networks may become polarized, leading to echo chambers and political gridlock. Accurately measuring this phenomenon is a critical challenge. Existing measur…

cs.SI2025★ 4 cited

Forming Coordinated Teams that Balance Task Coverage and Expert Workload

Karan Vombatkere, Evimaria Terzi, Aristides Gionis

We study a new formulation of the team-formation problem, where the goal is to form teams to work on a given set of tasks requiring different skills. Deviating from the classic pro…

cs.SI2024★ 2 cited

Polaris: Sampling from the Multigraph Configuration Model with Prescribed Color Assortativity

Giulia Preti, Matteo Riondato, Aristides Gionis +1

We introduce Polaris, a network null model for colored multi-graphs that preserves the Joint Color Matrix. Polaris is specifically designed for studying network polarization, where…

cs.SI2024

Modeling the Impact of Timeline Algorithms on Opinion Dynamics Using Low-rank Updates

Tianyi Zhou, Stefan Neumann, Kiran Garimella +1

Timeline algorithms are key parts of online social networks, but during recent years they have been blamed for increasing polarization and disagreement in our society. Opinion-dyna…

cs.SI2024

Finding Densest Subgraphs with Edge-Color Constraints

Lutz Oettershagen, Honglian Wang, Aristides Gionis

We consider a variant of the densest subgraph problem in networks with single or multiple edge attributes. For example, in a social network, the edge attributes may describe the ty…