The strict compatibility and automorphy conjecture

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Let KK be a number field, let MM be a coefficient field, and let (rλ)(r_\lambda) be a weakly compatible system of Galois representations of rank nn. For each finite place vv of KK, let WDv\mathrm{WD}_v denote the associated Weil–Deligne representation, and let rec⁡Kv\operatorname{rec}_{K_v} be the local Langlands correspondence.

Strict compatibility and automorphy conjecture. Any weakly compatible system of Galois representations is strictly compatible, and is in addition automorphic: there is an algebraic automorphic representation π\pi of GL⁡n(AK)\operatorname{GL}_n(\mathbb A_K) such that

WDv≅rec⁡Kv(πv∣det⁡∣(1−n)/2)\mathrm{WD}_v\cong\operatorname{rec}_{K_v}(\pi_v|\det|^{(1-n)/2})

for each finite place vv of KK.

The conjecture combines the expected strict compatibility of weakly compatible systems with their automorphy and is the target of progress from automorphy lifting theorems. The source gives no resolution of the full statement.

References

Primary source

Toby Gee, “Modularity lifting theorems”, arXiv:2202.05818 (2022).

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