Showing 2019Show all
2 papers · 1 filter
math.AG2019
Automorphisms and the canonical ideal
Aristides Kontogeorgis, Alexios Terezakis, Ioannis Tsouknidas
The automorphism group of a curve is studied from the viewpoint of the canonical embedding and Petri's theorem. A criterion for identifying the automorphism group as an algebraic s…
math.AG2019
A cohomological treatise of HKG-covers with applications to the Nottingham group
Aristides Kontogeorgis, Ioannis Tsouknidas
We characterize Harbater-Katz-Gabber curves in terms of a family of cohomology classes satisfying a compatibility condition. Our construction is applied to the description of finit…