Burns–Macias Castillo equivariant Birch and Swinnerton-Dyer conjecture

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Let AA be an abelian variety, let F/kF/k be a finite Galois extension with group GG, let SS be the specified finite set of places, and let G^\widehat G be the set of irreducible complex characters of GG. For each ψ∈G^\psi\in\widehat G, let VψV_\psi afford ψ\psi, let eψe_\psi be the corresponding central primitive idempotent, and let ψˇ\check\psi be the contragredient character. Let LS(A,ψ,z)L_S(A,\psi,z) be the truncated Hasse–Weil–Artin LL-series, LS∗(A,ψ,1)L_S^*(A,\psi,1) its leading coefficient, Ωω∙(AF/k)\Omega_{\omega_\bullet}(A_{F/k}) the period element, SCS,ω∙(AF/k){\rm SC}_{S,\omega_\bullet}(A_{F/k}) the Nekovář–Selmer complex, hA,Fh_{A,F} the Néron–Tate height pairing, and μS(AF/k)\mu_S(A_{F/k}) the Fontaine–Messing correction term. Equivariant Birch and Swinnerton-Dyer conjecture. The following claims are valid: (i) \russ\char88(AF)(A_F) is finite; (ii) for every ψ∈G^\psi\in\widehat G, L(A,ψ,z)L(A,\psi,z) has an analytic continuation to z=1z=1 and has there a zero of order ψ(1)−1dim⁡C(eψ(C⊗ZAt(F)))\psi(1)^{-1}\operatorname{dim}_{\mathbb C}(e_\psi(\mathbb C\otimes_{\mathbb Z}A^t(F))); (iii) for every symplectic ψ∈G^s\psi\in\widehat G^{\rm s}, LS∗(A,ψ,1)L_S^*(A,\psi,1) is strictly positive, and there is a unique LS∗(AF/k,1)∈K1(R[G])L_S^*(A_{F/k},1)\in K_1(\mathbb R[G]) satisfying

Nrd⁡R[G](LS∗(AF/k,1))ψ=LS∗(A,ψˇ,1)\operatorname{Nrd}_{\mathbb R[G]}(L_S^*(A_{F/k},1))_\psi=L_S^*(A,\check\psi,1)

for all ψ\psi; and (iv)

∂G(LS∗(AF/k,1)Ωω∙(AF/k))=χG(SCS,ω∙(AF/k),hA,F)+μS(AF/k)\partial_G\left(\frac{L_S^*(A_{F/k},1)}{\Omega_{\omega_\bullet}(A_{F/k})}\right)=\chi_G({\rm SC}_{S,\omega_\bullet}(A_{F/k}),h_{A,F})+\mu_S(A_{F/k})

in K0(Z[G],R[G])K_0(\mathbb Z[G],\mathbb R[G]). This is the paper’s central equivariant refinement of Birch and Swinnerton-Dyer, relating Artin LL-values, Mordell–Weil ranks, Selmer complexes, heights, periods, and local correction terms. The source gives no resolution of the conjecture.

References

Primary source

David Burns and Daniel Macias Castillo, “On refined conjectures of Birch and Swinnerton-Dyer type for Hasse-Weil-Artin L-series”, arXiv:1909.03959 (2021).

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