Crystalline Chebotarëv density conjecture

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Let UU be the curve, let KK be the specified finite totally ramified extension, and let F{\mathcal{F}} be a convergent FF-isocrystal on UU. Fix u∈U(Fqe)u\in U({\mathbb{F}}_{q^e}), and write Gr⁡(F/U,u)\operatorname{Gr}({\mathcal{F}}/U,u) for its monodromy group and Frob⁡x(F)\operatorname{Frob}_x({\mathcal{F}}) for the Frobenius conjugacy class attached to each closed point x∈∣U∣x\in|U|. Crystalline Chebotarëv density conjecture. For every subset S⊂∣U∣S\subset|U| of Dirichlet density one, the set

⋃x∈SFrob⁡x(F)\bigcup_{x\in S}\operatorname{Frob}_x({\mathcal{F}})

is Zariski-dense in Gr⁡(F/U,u)\operatorname{Gr}({\mathcal{F}}/U,u). This is the crystalline analogue of Chebotarëv's density theorem. The source also notes that the Zariski topology is the expected appropriate topology; the conjecture's resolution is not specified here.

References

Primary source

Urs Hartl and Ambrus Pal, “Crystalline Chebotarëv density theorems”, arXiv:1811.07084 (2025).

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