arXiv Statistics ML By Giovanni Conforti, Alain Durmus, Marta Gentiloni Silveri

KL Convergence Guarantees for Score diffusion models under minimal data assumptions

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The paper presents new Kullback–Leibler convergence guarantees for score diffusion models that avoid restrictive Lipschitz assumptions on the score function. By analyzing models with fixed step size derived from the Ornstein–Uhlenbeck semigroup and its kinetic counterpart, the authors derive simple, sharp KL bounds that hold for any data distribution with finite Fisher information relative to the standard Gaussian. This extends theoretical guarantees to a broader class of data distributions without requiring early stopping or compact support.

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arXiv Machine Learning
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The Effect of Stochasticity in Score-Based Diffusion Sampling: a KL Divergence Analysis

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First-Order Stationarity of Reverse Diffusions

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