Buzzard–Diamond–Jarvis conjecture for the cohomology of Shimura curves

Let FF be a totally real field, let DD be an indefinite quaternion algebra over FF, and let SD(F)S^D(\mathbb F) be the direct limit of the mod pp étale cohomology of the associated Shimura curves. Let r:GFGL2(F)\overline r:G_F\to\mathrm{GL}_2(\mathbb F) be modular, and for each finite place ww let ρw=rGFw\overline\rho_w=\overline r|_{G_{F_w}}. Let πwD(r)\pi^D_w(\overline r) be the associated smooth admissible representations, characterized at wpw\mid p by the Serre-weight condition. Buzzard–Diamond–Jarvis' conjecture. There is a GF×(DFAF,f)×G_F\times(D\otimes_F\mathbb A_{F,f})^\times-equivariant isomorphism

SD(F)[mr]r(wπwD(r)).S^D(\mathbb F)[\mathfrak m_{\overline r}]\cong\overline r\otimes\bigl(\otimes'_w\pi^D_w(\overline r)\bigr).

At wpw\mid p, HomGL2(OFw)(σ,πwD(ρ))0\operatorname{Hom}_{\mathrm{GL}_2(\mathcal O_{F_w})}(\sigma,\pi^D_w(\overline{\rho}))\neq0 if and only if σD(ρw)\sigma\in\mathscr D(\overline{\rho}_w). The weight part is proved by Gee, Liu and Savitt under the usual Taylor–Wiles hypothesis, and multiplicity one is proved by Emerton, Gee and Savitt.

Sources & referencesView supporting material

Primary source

Yongquan Hu and Haoran Wang, “Multiplicity one for the mod p cohomology of Shimura curves: the tame case”, arXiv:1608.07992 (2017).

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