The sample complexity of exact-trace learning for autoregressive Chain-of-Thought is O((DSdim(H) + log(1/δ))/ε), matching the local next-token class with no dependence on rollout length.
Keeping the proof here lets the main text use the comparison chain without interrupting the proof of the autoregressive PAC bound
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The Optimal Sample Complexity of Learning Autoregressive Chain-of-Thought
The sample complexity of exact-trace learning for autoregressive Chain-of-Thought is O((DSdim(H) + log(1/δ))/ε), matching the local next-token class with no dependence on rollout length.