Mechanisms of Projective Composition of Diffusion Models

Apple Machine Learning Research

We study the theoretical foundations of composition in diffusion models, with a particular focus on out-of-distribution extrapolation and length-generalization. Prior work has shown that composing distributions via linear score combination can achieve promising results, including length-generalization in some cases (Du et al., 2023; Liu et al., 2022). However, our theoretical understanding of how and why such compositions work remains incomplete. In fact, it is not even entirely clear what it means for composition to “work”. This paper starts to address these fundamental gaps. We begin by…
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02/05/2025 – 00:09 /
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