Module

LocalizationRestrictionOfScalars.lean

Nyll.SchemeTheory.Modules.LocalizationRestrictionOfScalars
1 declaration indexed from sourceView source ↗

Localization after restricting scalars

Preserves the actual localized-module property under the prescribed coefficient ring map.

Imports5
  • Mathlib.Algebra.Category.ModuleCat.Basic
  • Mathlib.Algebra.Category.ModuleCat.ChangeOfRings
  • Mathlib.Algebra.Category.Ring.Basic
  • Mathlib.Algebra.Algebra.Tower
  • Mathlib.Algebra.Module.LocalizedModule.Basic
Imported by2

Declarations

ModuleCat.isLocalizedModuleAway_restrictScalars
Source context 4 commands

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

noncomputable section
universe u v
open CategoryTheory
namespace ModuleCat
theorem isLocalizedModuleAway_restrictScalars (R A : CommRingCat.{u}) (σ : R →+* A)
    (M N : ModuleCat.{v} A) (f : M ⟶ N) (r : R)
    [IsLocalizedModule (Submonoid.powers (σ r)) f.hom] :
    IsLocalizedModule (Submonoid.powers r) ((ModuleCat.restrictScalars σ).map f).hom