Arithmetic form of the ring-specific Oort conjecture

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Set K=Qpun^K=\widehat{\mathbb{Q}_p^{un}} and L=K(ζp∞)L=K(\zeta_{p^\infty}). Let CC be a finite cyclic group and define

RC:=RK[ζ∣C∣]⊂RL.R_C:=R_K[\zeta_{|C|}]\subset R_L.

Let M∣LM|L be a finite cyclic extension of LL with group CC, and set

D:=Spec⁡(RC[[Z]]).D:=\operatorname{Spec}(R_C[[Z]]).

Arithmetic ring-specific Oort conjecture. There exist l>0l>0 and a normal, CC-Galois, regular branched cover Y→DY\rightarrow D such that YkY_k is reduced, Lm=ML_m=M for m≫0m\gg0 and m≡1(modl)m\equiv1\pmod l, and dη=dmd_\eta=d_m for m≫0m\gg0 and m≡1(modl)m\equiv1\pmod l. This reformulates the ring-specific lifting conjecture arithmetically via the field-of-norms construction; the supplied text does not state a resolution.

References

Primary source

Scott Corry, “Galois covers of the open p-adic disc”, arXiv:0807.0619 (2011).

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