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Theorems · Theorem · commutative algebra

Module.lift_rank_of_isLocalizedModule_of_free

∀ {R : Type u_1} {M : Type uM} [inst : CommRing R] [inst_1 : AddCommGroup M] [inst_2 : Module R M] (Rₛ : Type uR')
  {Mₛ : Type uM'} [inst_3 : AddCommGroup Mₛ] [inst_4 : Module R Mₛ] [inst_5 : CommRing Rₛ] [inst_6 : Algebra R Rₛ]
  [inst_7 : Module Rₛ Mₛ] [IsScalarTower R Rₛ Mₛ] (S : Submonoid R) (f : M →ₗ[R] Mₛ) [IsLocalization S Rₛ]
  [IsLocalizedModule S f] [Module.Free R M] [Nontrivial Rₛ],
  Cardinal.lift.{uM, uM'} (Module.rank Rₛ Mₛ) = Cardinal.lift.{uM', uM} (Module.rank R M)

Also see IsLocalizedModule.lift_rank_eq for a version for non-free modules, but requires S to not contain any zero-divisors.

Defined in
Mathlib.RingTheory.LocalProperties.Projective
Cited by
1 results in Mathlib
Foundations
Depth 120 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
CommRingAddCommGroupModuleAddCommGroupModuleCommRingAlgebraModuleIsScalarTowerIsLocalizationIsLocalizedModuleModule.FreeNontrivial

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