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28 lines
731 B
Text
28 lines
731 B
Text
import Mathlib.RingTheory.Ideal.Basic
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import Mathlib.RingTheory.Noetherian
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import Mathlib.Order.KrullDimension
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import Mathlib.RingTheory.Artinian
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import Mathlib.RingTheory.Ideal.Quotient
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import Mathlib.AlgebraicGeometry.PrimeSpectrum.Basic
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variable {R : Type _} [CommRing R]
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-- Repeats the definition by Monalisa
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noncomputable def length : krullDim (Submodule _ _)
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-- The following is Stacks Lemma 10.60.5
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lemma dim_zero_Noetherian_iff_Artinian (R : Type _) [CommRing R] :
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IsNoetherianRing R ∧ krull_dim R = 0 ↔ IsArtinianRing R := by
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sorry
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#check IsNoetherianRing
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-- The following is Stacks Lemma 10.53.6
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lemma IsArtinian_iff_finite_length : IsArtinianRing R ↔ ∃ n : ℕ, length R R ≤ n := by sorry
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