A complete formalization of Fermat's Last Theorem for regular primes in Lean - Archive ouverte HAL
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Pré-Publication, Document De Travail Année : 2024
A complete formalization of Fermat's Last Theorem for regular primes in Lean
1 IMJ-PRG (UMR_7586) - Institut de Mathématiques de Jussieu - Paris Rive Gauche (UPMC - 4 place Jussieu, Case 247 - 75252 Paris Cedex 5 UP7D - Campus des Grands Moulins - Bâtiment Sophie Germain, Case 7012- 75205 PARIS Cedex 13 - France)
"> IMJ-PRG (UMR_7586) - Institut de Mathématiques de Jussieu - Paris Rive Gauche
2 UPCité - Université Paris Cité (85 boulevard Saint-Germain 75006 Paris - France)
"> UPCité - Université Paris Cité
3 UEA - University of East Anglia [Norwich] (Norwich Research Park, Norwich, NR4 7TJ, UK - Royaume-Uni)
"> UEA - University of East Anglia [Norwich]
4 Imperial College London (South Kensington Campus, London SW7 2AZ - Royaume-Uni)
"> Imperial College London
Eric Rodriguez Boidi
Alex Best
Ruben van De Velde
  • Fonction : Auteur

Résumé

We formalize a complete proof of the regular case of Fermat's Last Theorem in the Lean4 theorem prover. Our formalization includes a proof of Kummer's lemma, that is the main obstruction to Fermat's Last Theorem for regular primes. Rather than following the modern proof of Kummer's lemma via class field theory, we prove it by using Hilbert's Theorems 90-94 in a way that is more amenable to formalization.
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Dates et versions

hal-04718128 , version 1 (02-10-2024)
hal-04718128 , version 2 (15-10-2024)

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Riccardo Brasca, Christopher Birkbeck, Eric Rodriguez Boidi, Alex Best, Ruben van De Velde, et al.. A complete formalization of Fermat's Last Theorem for regular primes in Lean. 2024. ⟨hal-04718128v1⟩
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