ProofSketcher: Hybrid LLM + Lightweight Proof Checker for Reliable Math/Logic Reasoning

Fuente: arXiv
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Auteurs principaux: Kommuru, Kranthi, Khanvilkar, Kunal, Parekh, Gaurav
Format: Preprint
Publié: 2026
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author Kommuru, Kranthi
Khanvilkar, Kunal
Parekh, Gaurav
author_facet Kommuru, Kranthi
Khanvilkar, Kunal
Parekh, Gaurav
contents The large language models (LLMs) might produce a persuasive argument within mathematical and logical fields, although such argument often includes some minor missteps, including the entire omission of side conditions, invalid inference patterns, or appeals to a lemma that cannot be derived logically out of the context being discussed. These omissions are infamously hard to notice solely out of the text, as even the misconstrued construction still may seem mostly accurate. Conversely, interactive theorem provers like Lean and Coq have rigorous reliability by ensuring that syntactic and semantic statements only accept statements that can pass all the syntactic and semantic steps in the program which is a small trusted kernel of the language type-checks with. Despite the fact that this technique provides strong guarantees, it comes at quite a heavy price: the evidence must be completely formalized, and the evidence user or a auxiliary search program must provide an avalanche of low-level information. This paper presents a hybrid pipeline where an LLM generates a typed proof sketch in a compact DSL and a lightweight trusted kernel expands the sketch into explicit proof obligations.
format Preprint
id arxiv_https___arxiv_org_abs_2604_06401
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle ProofSketcher: Hybrid LLM + Lightweight Proof Checker for Reliable Math/Logic Reasoning
Kommuru, Kranthi
Khanvilkar, Kunal
Parekh, Gaurav
Artificial Intelligence
Computational Engineering, Finance, and Science
Computer Vision and Pattern Recognition
Machine Learning
The large language models (LLMs) might produce a persuasive argument within mathematical and logical fields, although such argument often includes some minor missteps, including the entire omission of side conditions, invalid inference patterns, or appeals to a lemma that cannot be derived logically out of the context being discussed. These omissions are infamously hard to notice solely out of the text, as even the misconstrued construction still may seem mostly accurate. Conversely, interactive theorem provers like Lean and Coq have rigorous reliability by ensuring that syntactic and semantic statements only accept statements that can pass all the syntactic and semantic steps in the program which is a small trusted kernel of the language type-checks with. Despite the fact that this technique provides strong guarantees, it comes at quite a heavy price: the evidence must be completely formalized, and the evidence user or a auxiliary search program must provide an avalanche of low-level information. This paper presents a hybrid pipeline where an LLM generates a typed proof sketch in a compact DSL and a lightweight trusted kernel expands the sketch into explicit proof obligations.
title ProofSketcher: Hybrid LLM + Lightweight Proof Checker for Reliable Math/Logic Reasoning
topic Artificial Intelligence
Computational Engineering, Finance, and Science
Computer Vision and Pattern Recognition
Machine Learning
url https://arxiv.org/abs/2604.06401