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

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 CΣΣC_{\Sigma}^{\Sigma'}. Let detZ[G](CΣΣ)\det_{\mathbb{Z}[G]^{-}}(C_{\Sigma}^{\Sigma'}) denote its determinant module, and let zH/F,Σ,Σz^-_{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

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

Equivalently, zH/F,Σ,Σz^-_{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.

Sources & referencesView supporting material

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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