Lean acts as a process-level reward oracle in GRPO-style RL, using tactic elaboration for first-error propagation and first-token credit to improve theorem proving over binary outcome rewards.
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Process-Verified Reinforcement Learning for Theorem Proving via Lean
Lean acts as a process-level reward oracle in GRPO-style RL, using tactic elaboration for first-error propagation and first-token credit to improve theorem proving over binary outcome rewards.