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Annulateurs circulaires et conjecture de Greenberg

Abstract : Given a real abelian field F with group G and an odd prime number ℓ, we define the circular subgroup of the pro-ℓ-group of logarithmic units and we show that for any Galois morphism ρ from the pro-ℓ-group of logarithmic units to Zℓ [G ], the image of the circular subgroup annihilates the ℓ-group of logarithmic classes. We deduce from this a proof of the logarithmic version of the Solomon conjecture. Using finally the deployment theorem of the tame ramification above the cyclotomic Zℓ-extension, we show that the same annihilation result holds for the image of the pro-ℓ-group of universal norms. This proves the Greenberg conjecture on the vanishing of the lamda invariant in the semi-simple case ℓ ∤ [F : Q], when the logarithmic class group of F is cyclic.
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Contributor : Jean-François Jaulent <>
Submitted on : Thursday, March 26, 2020 - 8:12:57 AM
Last modification on : Friday, March 19, 2021 - 3:23:59 AM
Long-term archiving on: : Saturday, June 27, 2020 - 12:36:06 PM


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  • HAL Id : hal-02519397, version 1
  • ARXIV : 2003.12301


Jean-François Jaulent. Annulateurs circulaires et conjecture de Greenberg. 2020. ⟨hal-02519397v1⟩



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