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Valentin De Bortoli

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#machine learning Preprint Sep 2026

Improved Distributional Diffusion Models

Distributional Diffusion Models (DDMs) replace the standard mean-prediction denoiser with a \emph{distributional} denoiser trained via a scoring rule objective, learning a stochastic approximation to $p(x_1 \mid x_t)$ rather than its conditional mean. However, scaling DDMs to modern image-generation settings faces two...

Tommaso Martorella, Alexandre Galashov, F. Krause et al. · 0 citations
#machine learning Preprint Sep 2026

Simplex Diffusion Models

Diffusion models have revolutionized generative modeling for continuous data through the gradual refinement of a belief state. This iterative refinement has not yet carried over to discrete diffusion models, which discard uncertainty at intermediate steps through categorical sampling (information collapse). We propose...

Justin Deschenaux, Alexandre Galashov, Andrew Campbell et al. · 1 citation
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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