The minus component of the equivariant Tamagawa number conjecture in determinant form

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Let H/FH/F be a finite abelian CM-extension, let G=Gal⁡(H/F)G=\operatorname{Gal}(H/F), and let Σ,Σ′\Sigma,\Sigma' be finite sets of places satisfying the hypotheses used to define the perfect complex CΣΣ′C_{\Sigma}^{\Sigma'}. Let det⁡Z[G]−(CΣΣ′)\det_{\mathbb{Z}[G]^{-}}(C_{\Sigma}^{\Sigma'}) denote its determinant module, and let zH/F,Σ,Σ′−z^-_{H/F,\Sigma,\Sigma'} be the minus-component zeta element obtained from the leading term of the equivariant LL-function and the regulator isomorphism. The minus eTNC. One has

det⁡Z[G]−(CΣΣ′)=zH/F,Σ,Σ′−Z[G]−.\det_{\mathbb{Z}[G]^{-}}(C_{\Sigma}^{\Sigma'})=z^-_{H/F,\Sigma,\Sigma'}\mathbb{Z}[G]^{-}.

Equivalently, zH/F,Σ,Σ′−z^-_{H/F,\Sigma,\Sigma'} is a basis of the determinant module. The paper states that this formulation is equivalent to the Fitting-ideal formulation above, but the supplied text does not establish that either conjecture is resolved.

References

Primary source

Mahiro Atsuta and Takenori Kataoka, “On the minus component of the equivariant Tamagawa number conjecture for G_m”, arXiv:2112.04783 (2021).

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