The Abel–Jacobi injectivity conjecture for special cycles

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Let ρ?∈{ρ,ρ∗(1)}\rho^{?}\in\{\rho,\rho^*(1)\}, let Kp⊂H(Ap∞)K^p\subset \mathrm{H}(\mathbf{A}^{p\infty}) be open compact, and let Kp∘K_p^\circ be the chosen hyperspecial subgroup. Let mρ?\mathfrak{m}_{\rho^{?}} be the corresponding maximal ideal, let Chr(XKpKp∘)Q‾p⟨p⟩\mathrm{Ch}^r(X_{K^pK_p^\circ})_{\overline{\mathbf{Q}}{}_p}^{\langle p\rangle} be the relevant localized cycle space, and let Mρ?,KpKp∘M_{\rho^{?},K^pK_p^\circ} be the associated Galois representation. Abel–Jacobi injectivity conjecture. The Abel–Jacobi map

AJ⁡p,KpKp∘ ⁣:(Chr(XKpKp∘)Q‾p⟨p⟩)mρ?⟶Hf1(E,Mρ?,KpKp∘)\operatorname{AJ}_{p,K^pK_p^\circ}\colon \left(\mathrm{Ch}^r(X_{K^pK_p^\circ})_{\overline{\mathbf{Q}}{}_p}^{\langle p\rangle}\right)_{\mathfrak{m}_{\rho^{?}}}\longrightarrow H^1_f(E,M_{\rho^{?},K^pK_p^\circ})

is injective for both choices ρ?∈{ρ,ρ∗(1)}\rho^{?}\in\{\rho,\rho^*(1)\} and every open compact KpK^p. This injectivity is assumed in order to descend the Beilinson–Bloch height pairing from cycles to Selmer groups. The source gives no evidence of a general resolution.

References

Primary source

Daniel Disegni, “Theta cycles and the Beilinson–Bloch–Kato conjectures”, arXiv:2303.17817 (2024).

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