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Yifei Li

Math-Shepherd coauthor. Homepage and GitHub identify him as an Ohio State PhD student advised by Huan Sun, with prior Peking University MSc and Northeastern University undergraduate background.

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Jun 23, 2026

Math Shepherd: Verify and Reinforce LLMs Step by step without Human Annotations

Math Shepherd 的核心价值在于把数学推理步骤的标注问题改写为“当前 step 之后还能否补全到正确答案”的 Monte Carlo potential estimation:对每个中间 step 采样多个 continuation,用最终答案正确性给 step 生成 hard / soft pseudo label,训练 PRM 做 verifier reranking,并进一步把 PRM reward 接入 step b...

2312.08935-math-shepherd-automatic-process-supervision Process SupervisionVerifierReward Modeling