Burns's Fitting ideal conjecture for Selmer modules

Let H/FH/F be a finite abelian CM extension, let R=Z[1/2][G]R=\mathbf{Z}[1/2][G]^-, and define the Selmer module

SelST(H)=HomZ(HT,Z)/wSHTHZ,\operatorname{Sel}^T_S(H)=\operatorname{Hom}_{\mathbf{Z}}(H_T^*,\mathbf{Z})/\prod_{w\notin S_H\cup T_H}\mathbf{Z},

with contragredient GG-action. Let ΘS,T\Theta_{S,T} be the smoothed Stickelberger element and let #\# denote the involution induced by gg1g\mapsto g^{-1}. Burns's conjecture. One should have

FittR(SelST(H))=(ΘS,T#).\operatorname{Fitt}_R(\operatorname{Sel}^T_S(H)^-)=(\Theta_{S,T}^\#).

This seeks an arithmetic Selmer module whose Fitting ideal is generated by the Stickelberger element. The source gives no resolution status.

Sources & referencesView supporting material

Primary source

Samit Dasgupta and Mahesh Kakde, “On the Brumer-Stark Conjecture and Refinements”, arXiv:2204.09037 (2022).

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