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Valentin De Bortoli

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#machine learning Preprint Sep 2026

Improved Distributional Diffusion Models

A stochastic few-step generator whose FID does not degrade as the sampling budget grows from 4 to 50 NFE, and the same recipe transfers to text-to-image generation.

Tommaso Martorella, Alexandre Galashov, F. Krause et al. · 1 citation
#machine learning Preprint Sep 2026

Simplex Diffusion Models

Simplex Diffusion Models (SDMs) are proposed, a framework that lifts the diffusion process to the probability simplex to represent beliefs over categories and can carry uncertainty across denoising steps, which mitigates information collapse.

Justin Deschenaux, Alexandre Galashov, Andrew Campbell et al. · 2 citations
Preprint Aug 2026

Adversarial Learning of Classifier-Free Guidance Schedules

This paper learns the guidance schedule as a function of diffusion time, conditioning and the current noisy sample, in order to better align sampled images with the text prompt.

A. Pokle, Alexandre Galashov, Arnaud Doucet et al. · 0 citations

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