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[Merged by Bors] - feat: port RingTheory.HahnSeries #4261

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[Merged by Bors] - feat: port RingTheory.HahnSeries #4261

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50f4ca5
feat: port RingTheory.HahnSeries
ChrisHughes24 May 23, 2023
449b6e0
Initial file copy from mathport
ChrisHughes24 May 23, 2023
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automated fixes
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800 lines
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hard proof
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finish red
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ChrisHughes24 May 23, 2023
629f2d5
Merge remote-tracking branch 'origin/master' into port/RingTheory.Hah…
ChrisHughes24 May 23, 2023
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1 change: 1 addition & 0 deletions Mathlib.lean
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Expand Up @@ -1933,6 +1933,7 @@ import Mathlib.RingTheory.GradedAlgebra.Basic
import Mathlib.RingTheory.GradedAlgebra.HomogeneousIdeal
import Mathlib.RingTheory.GradedAlgebra.HomogeneousLocalization
import Mathlib.RingTheory.GradedAlgebra.Radical
import Mathlib.RingTheory.HahnSeries
import Mathlib.RingTheory.Henselian
import Mathlib.RingTheory.Ideal.AssociatedPrime
import Mathlib.RingTheory.Ideal.Basic
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2 changes: 1 addition & 1 deletion Mathlib/RingTheory/DiscreteValuationRing/Basic.lean
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Expand Up @@ -433,7 +433,7 @@ theorem addVal_uniformizer {ϖ : R} (hϖ : Irreducible ϖ) : addVal R ϖ = 1 :=
using addVal_def ϖ 1 hϖ 1
#align discrete_valuation_ring.add_val_uniformizer DiscreteValuationRing.addVal_uniformizer

@[simp]
--@[simp] Porting note: simp can prove it
theorem addVal_mul {a b : R} :
addVal R (a * b) = addVal R a + addVal R b :=
(addVal R).map_mul _ _
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