The good-reduction lifting conjecture for cyclic covers of the projective line
The good-reduction lifting conjecture for cyclic covers of the projective line
Let be the ground field, let , and let be the distinguished branch point with residue field . For a character , call it admissible if it defines the relevant -cover, and call it a lift of when its reduction is . Say that such a character has good reduction when it has étale reduction and the cover corresponding to its reduction is smooth.
Suppose that . Let be a character of order , unramified outside . Then, after replacing by a finite extension if necessary, there exists an admissible character with good reduction lifting .
This is a reformulation of the local Oort conjecture for -covers of the projective line. Its status depends on the local lifting result being used; the supplied text gives no resolution evidence for this formulation.
Sources & referencesView supporting material
Primary source
Andrew Obus and Stefan Wewers, “Cyclic Extensions and the Local Lifting Problem”, arXiv:1203.5057 (2012).
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