The local Oort conjecture for cyclic groups
Let be an algebraically closed field of characteristic , and let be a finite group. A -Galois extension is an integral extension of integrally closed domains that is -Galois on the level of fraction fields. The local lifting problem asks whether there exists a discrete valuation ring of characteristic zero with residue field and a -Galois extension reducing to , with and reducing to and , respectively.
Local Oort conjecture. The local lifting problem can always be solved when is cyclic.
Through the local-global principle, this would imply that every Galois cover of -curves with cyclic inertia groups lifts to characteristic zero, even when its global Galois group is not cyclic.
References
Primary source
Andrew Obus and Stefan Wewers, “Cyclic Extensions and the Local Lifting Problem”, arXiv:1203.5057 (2012).
Progress summary
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