3 papers
cs.SI2025
Rewarding Engagement and Personalization in Popularity-Based Rankings Amplifies Extremism and Polarization
Jacopo D'Ignazi, Emma Fraxanet Morales, Andreas Kaltenbrunner +3
Despite extensive research, the mechanisms through which online platforms shape extremism and polarization remain poorly understood. We identify and test a mechanism, grounded in e…
cs.LG2023
Improving Subgraph-GNNs via Edge-Level Ego-Network Encodings
Nurudin Alvarez-Gonzalez, Andreas Kaltenbrunner, Vicenç Gómez
We present a novel edge-level ego-network encoding for learning on graphs that can boost Message Passing Graph Neural Networks (MP-GNNs) by providing additional node and edge featu…
cs.LG2022
Beyond 1-WL with Local Ego-Network Encodings
Nurudin Alvarez-Gonzalez, Andreas Kaltenbrunner, Vicenç Gómez
Identifying similar network structures is key to capture graph isomorphisms and learn representations that exploit structural information encoded in graph data. This work shows tha…