Module

ActualNormalizationWildDecompositionNormal.lean

Nyll.EtaleFundamentalGroups.Inertia.ActualNormalizationWildDecompositionNormal
1 declaration indexed from sourceView source ↗

The SAME wild subgroup is normal in original decomposition

The independent subgroup is included by the actual I-to-D inclusion. Its proved stability under original conjugation yields normality in D.

Declarations

EtaleFundamentalGroups.Inertia.actualNormalizationWildSubgroup_normal_in_decomposition
Source context 3 commands

Surrounding namespaces, section variables, and local commands at this declaration.

namespace EtaleFundamentalGroups.Inertia
open SchemeTheory
universe u v w
theorem actualNormalizationWildSubgroup_normal_in_decomposition
    (A : Type u) (K : Type v) (L : Type w)
    [CommRing A] [IsDomain A] [IsDiscreteValuationRing A]
    [Field K] [Field L] [Algebra A K] [IsFractionRing A K]
    [Algebra K L] [Algebra A L] [IsScalarTower A K L] [IsGalois K L]
    (Q : Ideal (normalizationCommAlgCat A L).carrier) [Q.IsMaximal] :
    ((actualNormalizationWildSubgroup A K L Q).map
      (actualNormalizationInertiaToDecomposition A K L Q)).Normal