Early stopping plus normalizing flow initialization extends diffusion models to any target distribution with proven KL convergence, and a hybrid flow-SGM pipeline captures heavy tails without tail-specific assumptions.
Recent research has highlighted limitations of FID (Jayasumana et al., 2023; Stein et al., 2023); therefore, we also consider other metrics to assess sample quality
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Generalizing Score-based generative models for Heavy-tailed Distributions
Early stopping plus normalizing flow initialization extends diffusion models to any target distribution with proven KL convergence, and a hybrid flow-SGM pipeline captures heavy tails without tail-specific assumptions.