A Formal Proof of the Irrationality of $ζ(3)$ in Lean 4

Fuente: arXiv
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Main Authors: Liu, Junqi, Zhang, Jujian, Zhi, Lihong
Format: Preprint
Published: 2025
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_version_ 1866913979535720448
author Liu, Junqi
Zhang, Jujian
Zhi, Lihong
author_facet Liu, Junqi
Zhang, Jujian
Zhi, Lihong
contents We formalize a proof of the irrationality of $ζ(3)$ in Lean 4, using Beukers' method. To support this, we extend the Lean mathematical library (Mathlib) by formalizing shifted Legendre polynomials and important results in analytic number theory that were previously missing. As part of the Lean 4 PrimeNumberTheoremAnd project, we also formalize the asymptotic behavior of the prime counting function, giving the first formal proof in Lean 4 of a version of the Prime Number Theorem with an error term which is stronger than what had previously been formalized. This result is a crucial ingredient in proving the irrationality of $ζ(3)$. Our complete Lean 4 formalization is publicly available on GitHub.
format Preprint
id arxiv_https___arxiv_org_abs_2503_07625
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle A Formal Proof of the Irrationality of $ζ(3)$ in Lean 4
Liu, Junqi
Zhang, Jujian
Zhi, Lihong
Number Theory
We formalize a proof of the irrationality of $ζ(3)$ in Lean 4, using Beukers' method. To support this, we extend the Lean mathematical library (Mathlib) by formalizing shifted Legendre polynomials and important results in analytic number theory that were previously missing. As part of the Lean 4 PrimeNumberTheoremAnd project, we also formalize the asymptotic behavior of the prime counting function, giving the first formal proof in Lean 4 of a version of the Prime Number Theorem with an error term which is stronger than what had previously been formalized. This result is a crucial ingredient in proving the irrationality of $ζ(3)$. Our complete Lean 4 formalization is publicly available on GitHub.
title A Formal Proof of the Irrationality of $ζ(3)$ in Lean 4
topic Number Theory
url https://arxiv.org/abs/2503.07625