Burns's Fitting ideal conjecture for Selmer modules

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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

Sel⁡ST(H)=Hom⁡Z(HT∗,Z)/∏w∉SH∪THZ,\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 g↦g−1g\mapsto g^{-1}. Burns's conjecture. One should have

Fitt⁡R(Sel⁡ST(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.

References

Primary source

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

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