Langlands correspondence for weight two eigenforms over number fields

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Let KK be a number field and let N{\mathfrak N} be an ideal of OK{\mathcal O}_K. Let f{\mathfrak f} be a non-trivial, new weight 2 complex eigenform over KK of level N{\mathfrak N}. For a prime q∤N{\mathfrak q}\nmid {\mathfrak N}, let Norm⁡(q)\operatorname{Norm}({\mathfrak q}) denote its absolute norm. A fake elliptic curve over KK is an abelian surface with the corresponding quaternionic multiplication, as intended by the source. Langlands correspondence conjecture. If KK has a real place, there exists an elliptic curve Ef/KE_{\mathfrak f}/K of conductor N{\mathfrak N} such that

#Ef(OK/q)=1+Norm⁡(q)−f(Tq)\#E_{\mathfrak f}({\mathcal O}_K/{\mathfrak q})=1+\operatorname{Norm}({\mathfrak q})-{\mathfrak f}(T_{\mathfrak q})

for all q∤N{\mathfrak q}\nmid {\mathfrak N}. If KK is totally complex, there exists either such an elliptic curve satisfying the same formula, or a fake elliptic curve Af/KA_{\mathfrak f}/K of conductor N2{\mathfrak N}^2 such that

#Af(OK/q)=(1+Norm⁡(q)−f(Tq))2\#A_{\mathfrak f}({\mathcal O}_K/{\mathfrak q})=(1+\operatorname{Norm}({\mathfrak q})-{\mathfrak f}(T_{\mathfrak q}))^2

for all q∤N{\mathfrak q}\nmid {\mathfrak N}. This is presented as a special case of a fundamental conjecture from the Langlands programme and connects automorphic eigenforms with elliptic or fake elliptic curves. The source gives no resolution status for this formulation.

References

Primary source

Yasemin Kara and Ekin Ozman, “Asymptotic Generalized Fermat's Last Theorem over Number Fields”, arXiv:1904.02349 (2019).

Additional references

2 papers in this index state this conjecture (2014–2019). The statement above is taken from the most recent of them; the others are arXiv:1409.3517.

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