Automorphic–Galois comparison conjecture for \a3-invariants

Let ρπ,p ⁣:Gal(Qp/Fp)G^(Ω)\rho_{\pi,\mathfrak{p}}\colon\operatorname{Gal}(\overline{\mathbb{Q}}_p/F_{\mathfrak{p}})\to\widehat{G'}(\Omega) be the local Galois representation attached to π\pi, and let Δ\Delta be the set of roots. For each iΔi\in\Delta, let Li(ρπ,p)Homct(Fp×,Ω)\mathcal{L}_{i}(\rho_{\pi,\mathfrak{p}})\subseteq\operatorname{Hom}_{\operatorname{ct}}(F_{\mathfrak{p}}^{\times},\Omega) be the Galois-theoretic invariant defined from the corresponding two-dimensional quotient. Automorphic–Galois comparison conjecture. The representation ρπ,p\rho_{\pi,\mathfrak{p}} is special and, for every iΔi\in\Delta,

Li(ρπ,p)=Li(0)(π,p)\mathbbm1.\mathcal{L}_{i}(\rho_{\pi,\mathfrak{p}})=\mathcal{L}_{i}^{(0)}(\pi,\mathfrak{p})^{{\mathbbm 1}}.

This is the predicted comparison between automorphic and Galois-theoretic L\mathcal{L}-invariants; it is presented as a prediction and remains open in the stated generality.

Sources & referencesView supporting material

Primary source

Lennart Gehrmann, “Automorphic L-invariants for reductive groups”, arXiv:1912.05209 (2021).

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