The tensor-induction local-global compatibility conjecture

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Let K=FvK=F_v be unramified, let π\pi be an automorphic admissible smooth representation of GL2(K){\rm GL}_2(K) over F\mathbb{F}, and let r‾v\overline{r}_v be its corresponding local Galois representation. Let DA(π)D_A(\pi) be the associated étale (φ,OK×)(\varphi,\mathcal{O}_K^\times)-module over AA, and let DA⊗(r‾v(1))D_A^\otimes(\overline{r}_v(1)) be the module attached to the tensor induction of the twist r‾v(1)\overline{r}_v(1). The tensor-induction compatibility conjecture. There is an isomorphism of étale (φ,OK×)(\varphi,\mathcal{O}_K^\times)-modules over AA,

DA(π)≅DA⊗(r‾v(1)).D_A(\pi)\cong D_A^\otimes(\overline{r}_v(1)).

This is the paper's proposed local-global compatibility statement; the surrounding theorem proves it under semisimplicity and sufficient genericity assumptions, while the conjecture removes those assumptions.

References

Primary source

Christophe Breuil, Florian Herzig, Yongquan Hu, Stefano Morra and Benjamin Schraen, “Multivariable (φ,O_K^)-modules and local-global compatibility”, arXiv:2211.00438 (2024).

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