The local-global compatibility conjecture for the Hecke-algebra Galois representation

Let EE be the quadratic field under consideration, let mh\mathfrak{m}\subset h be a non-Eisenstein maximal ideal, and write T:=hm\mathbf{T}:=h_\mathfrak{m}. Let

ρm:Gal(E/E)GLn(T)\rho_\mathfrak{m}:{\mathrm{Gal}}(\overline{E}/E)\to\mathrm{GL}_n(\mathbf{T})

be the Galois representation in the preceding conjecture. Local-global compatibility conjecture. The representation ρm\rho_\mathfrak{m} satisfies local-global compatibilities at minimal, Fontaine–Laffaille, and Taylor–Wiles places. Some compatibilities are known for related representations over nilpotent quotients in the imaginary CM case, while the source states that no such compatibilities at bad places are known for the representation in the completely split case.

Sources & referencesView supporting material

Primary source

Tristan Ricoul, “Real quadratic base changes for GL_3 and integral periods relations”, arXiv:2411.16381 (2024).

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