Peking University lab blog: Stein's lemma links rejection sampling and Best-of-N for diffusion reasoning
2prime_PKU · x · 2026-10-13
Peking University's 2prime lab publishes its first blog exploring whether diffusion models can 'think longer': Stein's lemma unifies rejection sampling and Best-of-N as gradient-free guidance, and shared ancestry can amplify SMC variance over long-horizon reasoning.
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