Module

ActualFiniteTameScalarData.lean

Nyll.EtaleFundamentalGroups.Inertia.ActualFiniteTameScalarData
2 declarations indexed from sourceView source ↗

The canonical scalar action at the actual finite normalization

The factory closes the finite root interface before original inertia and decomposition elements occur. Every field is the already constructed map.

Declarations

EtaleFundamentalGroups.Inertia.actualFiniteTameScalarData

The SAME normalized finite scalar character, conjugation and residue action.

Source context 5 commands

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

noncomputable section
namespace EtaleFundamentalGroups.Inertia
open SchemeTheory
universe u v w
variable (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]
def actualFiniteTameScalarData (E : FiniteGaloisIntermediateField K L) :
    ScalarInertiaActionData.{w}
EtaleFundamentalGroups.Inertia.actualFiniteTameScalarData_equivariant

Equivariance is an independently proved theorem about those actual data.

Source context 5 commands

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

noncomputable section
namespace EtaleFundamentalGroups.Inertia
open SchemeTheory
universe u v w
variable (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]
theorem actualFiniteTameScalarData_equivariant
    (E : FiniteGaloisIntermediateField K L)
    (d : (actualFiniteTameScalarData A K L Q E).decomposition)
    (σ : (actualFiniteTameScalarData A K L Q E).inertia) :
    (actualFiniteTameScalarData A K L Q E).character
        ((actualFiniteTameScalarData A K L Q E).conjugate d σ) =
      (actualFiniteTameScalarData A K L Q E).action d
        ((actualFiniteTameScalarData A K L Q E).character σ)