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Sebastian Dalleiger

7 accepted papers

2026

Gradient-Based Diversity Optimization with Differentiable Top-$k$ Objective

ICLR 2026poster

Predicting relevance is a pervasive problem across digital platforms, covering social media, entertainment, and commerce. However, when optimized solely for relevance and engagement, many machine-learning models amplify data biases and produce homogeneous outputs, reinforcing filter bubbles and cont…

Cited by 0SourcecodeScholar
2025

Federated Binary Matrix Factorization Using Proximal Optimization

AAAI 2025technical

Identifying informative components in binary data is an essential task in many application areas, including life sciences, social sciences, and recommendation systems. Boolean matrix factorization (BMF) is a family of methods that performs this task by factorizing the data into dense factor matrices…

Cited by 0SourcePDFScholar
2025

From Your Block to Our Block: How to Find Shared Structure Between Stochastic Block Models over Multiple Graphs

AAAI 2025technical

Stochastic Block Models (SBMs) are a popular approach to modeling single real-world graphs. The key idea of SBMs is to partition the vertices of the graph into blocks with similar edge densities within, as well as between different blocks. However, what if we are given not one but multiple graphs th…

Cited by 0SourcePDFScholar
2023

Ollivier-Ricci Curvature for Hypergraphs: A Unified Framework

ICLR 2023poster

Bridging geometry and topology, curvature is a powerful and expressive invariant. While the utility of curvature has been theoretically and empirically confirmed in the context of manifolds and graphs, its generalization to the emerging domain of hypergraphs has remained largely unexplored. On graph…