The K(1)-local Anderson duality conjecture for locally compact K-theory

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Let KK denote non-connective KK-theory. Let pp be an odd prime, let FF be a number field, and let SS be a finite set of finite places of FF such that 1p∈OS\frac{1}{p}\in\mathcal{O}_{S}. Write LCOS\mathsf{LC}\mathcal{O}_{S} and LCOS,ad\mathsf{LC}\mathcal{O}_{S,ad} for the locally compact categories appearing in the fiber sequences, and let IZpI_{\mathbf{Z}_{p}} denote the pp-adic Anderson dual. The K(1)-local Anderson duality conjecture. There is an equivalence of fiber sequences

\xymatrix{ L_{K(1)}K(\mathcal{O}_{S}) \ar[r] \ar@{=>}[d] & L_{K(1)}K(\mathsf{LC}\mathcal{O}_{S,ad}) \ar[r] \ar@{<=>}[d] & L_{K(1)}K(\mathsf{LC}\mathcal{O}_{S}) \\ I_{\mathbf{Z}_{p}}L_{K(1)}K(\mathsf{LC}\mathcal{O}_{S}) \ar[r] & I_{\mathbf{Z}_{p}}L_{K(1)}K(\mathsf{LC}\mathcal{O}_{S,ad}) \ar[r] & I_{\mathbf{Z}_{p}}L_{K(1)}K(\mathcal{O}_{S}) \ar@{=>}[u] }

where the lower row is the Anderson dual of the top row, perhaps up to sign. Here an equivalence of fiber sequences means that the underlying bi-Cartesian square of spectra, including the null homotopy, is equipped with an equivalence to the dual square. The conjecture refines the established objectwise K(1)K(1)-local duality and remains unproved because making the equivalence of the full fiber sequences, including its coherences, is difficult.

References

Primary source

Oliver Braunling, “Local compactness as the K(1)-local dual of finite generation”, arXiv:2301.05943 (2023).

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