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The equivariant Tamagawa number conjectures for modular motives with coefficients in Hecke algebras

Olivier Fouquet

Vol. 7 (2025), No. 3-4, 791–829
Abstract

Modular motives have coefficients in Hecke algebras. According to the equivariant philosophy, special values of L-functions of eigencuspforms should therefore exhibit equivariant properties with respect to various Hecke actions. This article shows that this is indeed the case at least under broad conditions on ramification and deduces from them new properties of the Iwasawa main conjecture for modular forms.

Dedicated to the memory of Joël Bellaïche

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Keywords
modular forms, Iwasawa theory, Tamagawa number conjectures
Mathematical Subject Classification
Primary: 11F03, 11F80, 11G40, 11M41, 11R23
Milestones
Received: 19 January 2024
Revised: 21 December 2024
Accepted: 5 January 2025
Published: 12 September 2025
Authors
Olivier Fouquet
Laboratoire de mathématiques de Besançon
Université Marie et Louis Pasteur
Besançon
France