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Mathieu Besançon

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#machine learning Preprint Oct 2026

Low-Budget Active Learning through Entropic Optimal Transport

This paper uses entropic optimal transport, specifically the Sinkhorn divergence, as the coreset selection criterion, which first allows us to get dimension-free sample complexity results, and second admits computationally efficient gradient evaluations.

Rim Hajal, Mathieu Besançon, Jérôme Malick · 0 citations
Preprint Aug 2026

On the Iterate Convergence of AdaGrad for Generalized Smooth Convex Optimization

This work constructs a counterexample empirically showing that smoothness alone is not sufficient for the sequential convergence of AdaGrad-type algorithms, and suggesting that additional geometric hypotheses are indispensable for sequential convergence results.

Mathieu Besançon, Tung Le · 0 citations

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