[2606.31134] Beyond the Library: An Agentic Framework for Autoformalizing Research Mathematics

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arXiv:2606.31134 (cs)

[Submitted on 30 Jun 2026 (v1), last revised 1 Jul 2026 (this version, v2)]

Title:Beyond the Library: An Agentic Framework for Autoformalizing Research Mathematics

Authors:Arshia Soltani Moakhar, Iman Gholami, Max Springer, Mahdi JafariRaviz, MohammadTaghi Hajiaghayi<br>View a PDF of the paper titled Beyond the Library: An Agentic Framework for Autoformalizing Research Mathematics, by Arshia Soltani Moakhar and 4 other authors

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Abstract:While Large Language Models (LLMs) have demonstrated exceptional capabilities in mathematical reasoning, they frequently produce subtle errors that evade human detection. Formal mathematical languages like Lean 4 offer mechanical proof checking, strongly motivating the need for autoformalization: the automatic translation of natural language mathematics into verifiable code. Recent trends indicate that general-purpose LLMs, heavily optimized for standard programming, now outperform smaller models explicitly fine-tuned for Lean. Leveraging this shift, we introduce an agentic autoformalization framework powered by general coding LLMs. At the core of our system is an orchestrator that manages a multi-agent pipeline tailored for research-level mathematics. Because cutting-edge research frequently relies on concepts outside the scope of existing libraries like Mathlib, our system dynamically extends necessary type definitions and validates them via a novel Auxiliary Lemma technique before formalizing the primary theorems. We applied our approach to PutnamBench, producing machine-checked Lean proofs for a random sample of 32 problems. Furthermore, we evaluate our system on five papers from the ACM Symposium on Theory of Computing (STOC) spanning combinatorics, communication complexity, mechanism design, and learning theory, successfully formalizing their main theorems and validating the generated formalizations with human experts; for all five we also formalize the proofs alongside the statements, and notably two of them are proved with no axioms beyond Lean's kernel. All of our formalizations are available at this https URL .

Comments:<br>preprint

Subjects:

Artificial Intelligence (cs.AI)

Cite as:<br>arXiv:2606.31134 [cs.AI]

(or<br>arXiv:2606.31134v2 [cs.AI] for this version)

https://doi.org/10.48550/arXiv.2606.31134

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Submission history<br>From: Arshia Soltani Moakhar [view email]<br>[v1]<br>Tue, 30 Jun 2026 05:05:03 UTC (757 KB)

[v2]<br>Wed, 1 Jul 2026 19:08:57 UTC (750 KB)

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