arXiv AI By Jilin Hu, Jianyu Zhang, Yongwang Zhao, Talia Ringer

HybridProver: Augmenting Theorem Proving with LLM-Driven Proof Synthesis and Refinement

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HybridProver is a unified framework that combines whole-proof synthesis and tactic-based generation using proof sketches as an intermediate representation. Implemented in Isabelle/HOL, it employs two 7B-scale LLMs trained on optimized Isabelle datasets. On the miniF2F Isabelle benchmark, HybridProver achieved a 73.8% success rate, surpassing the previous state of the art of 61.9%, and ablation studies examined the effects of dataset quality, training settings, and sampling strategies.

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