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feat: port RingTheory.QuotientNoetherian (#3308)
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Co-authored-by: Parcly Taxel <reddeloostw@gmail.com>
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Parcly-Taxel and Parcly-Taxel committed Apr 6, 2023
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Expand Up @@ -1459,6 +1459,7 @@ import Mathlib.RingTheory.Polynomial.Vieta
import Mathlib.RingTheory.Prime
import Mathlib.RingTheory.PrincipalIdealDomain
import Mathlib.RingTheory.QuotientNilpotent
import Mathlib.RingTheory.QuotientNoetherian
import Mathlib.RingTheory.ReesAlgebra
import Mathlib.RingTheory.RingInvo
import Mathlib.RingTheory.SimpleModule
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23 changes: 23 additions & 0 deletions Mathlib/RingTheory/QuotientNoetherian.lean
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/-
Copyright (c) 2021 Anne Baanen. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Anne Baanen
! This file was ported from Lean 3 source module ring_theory.quotient_noetherian
! leanprover-community/mathlib commit da420a8c6dd5bdfb85c4ced85c34388f633bc6ff
! Please do not edit these lines, except to modify the commit id
! if you have ported upstream changes.
-/
import Mathlib.RingTheory.Noetherian
import Mathlib.RingTheory.QuotientNilpotent

/-!
# Noetherian quotient rings and quotient modules
-/


instance Ideal.Quotient.isNoetherianRing {R : Type _} [CommRing R] [h : IsNoetherianRing R]
(I : Ideal R) : IsNoetherianRing (R ⧸ I) :=
have : IsNoetherian R R := by simp_all only -- Porting note: this instance is needed
isNoetherianRing_iff.mpr <| isNoetherian_of_tower R <| Submodule.Quotient.isNoetherian _
#align ideal.quotient.is_noetherian_ring Ideal.Quotient.isNoetherianRing

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