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TEST
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monula95 dutta
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import Mathlib.Order.KrullDimension
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import Mathlib.Order.JordanHolder
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import Mathlib.AlgebraicGeometry.PrimeSpectrum.Basic
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import Mathlib.Order.Height
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import Mathlib.RingTheory.Ideal.Basic
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import Mathlib.RingTheory.Ideal.Operations
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import Mathlib.LinearAlgebra.Finsupp
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import Mathlib.RingTheory.GradedAlgebra.Basic
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import Mathlib.RingTheory.GradedAlgebra.HomogeneousIdeal
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import Mathlib.Algebra.Module.GradedModule
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import Mathlib.RingTheory.Ideal.AssociatedPrime
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import Mathlib.RingTheory.Noetherian
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import Mathlib.RingTheory.Artinian
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import Mathlib.Algebra.Module.GradedModule
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import Mathlib.RingTheory.Noetherian
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import Mathlib.RingTheory.Finiteness
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import Mathlib.RingTheory.Ideal.Operations
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import Mathlib.AlgebraicGeometry.PrimeSpectrum.Basic
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import Mathlib.RingTheory.FiniteType
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import Mathlib.Order.Height
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import Mathlib.RingTheory.PrincipalIdealDomain
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import Mathlib.RingTheory.DedekindDomain.Basic
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import Mathlib.RingTheory.Ideal.Quotient
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import Mathlib.RingTheory.Localization.AtPrime
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import Mathlib.Order.ConditionallyCompleteLattice.Basic
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import Mathlib.Algebra.DirectSum.Ring
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import Mathlib.RingTheory.Ideal.LocalRing
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import Mathlib
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import Mathlib.Algebra.MonoidAlgebra.Basic
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import Mathlib.Data.Finset.Sort
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import Mathlib.Order.Height
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import Mathlib.Order.KrullDimension
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import Mathlib.Order.JordanHolder
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import Mathlib.AlgebraicGeometry.PrimeSpectrum.Basic
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import Mathlib.Order.Height
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import Mathlib.RingTheory.Ideal.Basic
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import Mathlib.RingTheory.Ideal.Operations
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import Mathlib.LinearAlgebra.Finsupp
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import Mathlib.RingTheory.GradedAlgebra.Basic
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import Mathlib.RingTheory.GradedAlgebra.HomogeneousIdeal
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import Mathlib.Algebra.Module.GradedModule
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import Mathlib.RingTheory.Ideal.AssociatedPrime
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import Mathlib.RingTheory.Noetherian
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import Mathlib.RingTheory.Artinian
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import Mathlib.Algebra.Module.GradedModule
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import Mathlib.RingTheory.Noetherian
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import Mathlib.RingTheory.Finiteness
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import Mathlib.RingTheory.Ideal.Operations
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noncomputable def length ( A : Type _) (M : Type _)
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[CommRing A] [AddCommGroup M] [Module A M] := Set.chainHeight {M' : Submodule A M | M' < ⊤}
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def HomogeneousPrime { A σ : Type _} [CommRing A] [SetLike σ A] [AddSubmonoidClass σ A] (𝒜 : ℤ → σ) [GradedRing 𝒜] (I : Ideal A):= (Ideal.IsPrime I) ∧ (Ideal.IsHomogeneous 𝒜 I)
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def HomogeneousMax { A σ : Type _} [CommRing A] [SetLike σ A] [AddSubmonoidClass σ A] (𝒜 : ℤ → σ) [GradedRing 𝒜] (I : Ideal A):= (Ideal.IsMaximal I) ∧ (Ideal.IsHomogeneous 𝒜 I)
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--theorem monotone_stabilizes_iff_noetherian :
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-- (∀ f : ℕ →o Submodule R M, ∃ n, ∀ m, n ≤ m → f n = f m) ↔ IsNoetherian R M := by
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-- rw [isNoetherian_iff_wellFounded, WellFounded.monotone_chain_condition]
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open GradedMonoid.GSmul
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open DirectSum
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instance tada1 (𝒜 : ℤ → Type _) (𝓜 : ℤ → Type _) [∀ i, AddCommGroup (𝒜 i)] [∀ i, AddCommGroup (𝓜 i)] [DirectSum.GCommRing 𝒜]
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[DirectSum.Gmodule 𝒜 𝓜] (i : ℤ ) : SMul (𝒜 0) (𝓜 i)
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where smul x y := @Eq.rec ℤ (0+i) (fun a _ => 𝓜 a) (GradedMonoid.GSmul.smul x y) i (zero_add i)
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lemma mylem (𝒜 : ℤ → Type _) (𝓜 : ℤ → Type _) [∀ i, AddCommGroup (𝒜 i)] [∀ i, AddCommGroup (𝓜 i)] [DirectSum.GCommRing 𝒜]
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[h : DirectSum.Gmodule 𝒜 𝓜] (i : ℤ) (a : 𝒜 0) (m : 𝓜 i) :
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of _ _ (a • m) = of _ _ a • of _ _ m := by
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refine' Eq.trans _ (Gmodule.of_smul_of 𝒜 𝓜 a m).symm
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refine' of_eq_of_gradedMonoid_eq _
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exact Sigma.ext (zero_add _).symm <| eq_rec_heq _ _
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instance tada2 (𝒜 : ℤ → Type _) (𝓜 : ℤ → Type _) [∀ i, AddCommGroup (𝒜 i)] [∀ i, AddCommGroup (𝓜 i)] [DirectSum.GCommRing 𝒜]
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[h : DirectSum.Gmodule 𝒜 𝓜] (i : ℤ ) : SMulWithZero (𝒜 0) (𝓜 i) := by
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letI := SMulWithZero.compHom (⨁ i, 𝓜 i) (of 𝒜 0).toZeroHom
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exact Function.Injective.smulWithZero (of 𝓜 i).toZeroHom Dfinsupp.single_injective (mylem 𝒜 𝓜 i)
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instance tada3 (𝒜 : ℤ → Type _) (𝓜 : ℤ → Type _) [∀ i, AddCommGroup (𝒜 i)] [∀ i, AddCommGroup (𝓜 i)] [DirectSum.GCommRing 𝒜]
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[h : DirectSum.Gmodule 𝒜 𝓜] (i : ℤ ): Module (𝒜 0) (𝓜 i) := by
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letI := Module.compHom (⨁ j, 𝓜 j) (ofZeroRingHom 𝒜)
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exact Dfinsupp.single_injective.module (𝒜 0) (of 𝓜 i) (mylem 𝒜 𝓜 i)
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noncomputable def hilbert_function (𝒜 : ℤ → Type _) (𝓜 : ℤ → Type _) [∀ i, AddCommGroup (𝒜 i)] [∀ i, AddCommGroup (𝓜 i)]
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[DirectSum.GCommRing 𝒜]
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[DirectSum.Gmodule 𝒜 𝓜] (art: IsArtinianRing (𝒜 0)) (loc : LocalRing (𝒜 0))
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: ℤ → ℕ∞ := fun i => (length (𝒜 0) (𝓜 i))
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lemma hilbertz (𝒜 : ℤ → Type _) (𝓜 : ℤ → Type _) [∀ i, AddCommGroup (𝒜 i)] [∀ i, AddCommGroup (𝓜 i)]
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[DirectSum.GCommRing 𝒜]
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[DirectSum.Gmodule 𝒜 𝓜]
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(finlen : ∀ i, (length (𝒜 0) (𝓜 i)) < ⊤ ) : ℤ → ℤ := by
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intro i
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let h := hilbert_function 𝒜 𝓜
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simp at h
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let n : ℤ → ℕ := fun i ↦ WithTop.untop _ (finlen i).ne
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have hn : ∀ i, (n i : ℕ∞) = length (𝒜 0) (𝓜 i) := fun i ↦ WithTop.coe_untop _ _
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have' := hn i
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exact ((n i) : ℤ )
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noncomputable def dimensionring { A: Type _}
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[CommRing A] := krullDim (PrimeSpectrum A)
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noncomputable def dimensionmodule ( A : Type _) (M : Type _)
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[CommRing A] [AddCommGroup M] [Module A M] := krullDim (PrimeSpectrum (A ⧸ ((⊤ : Submodule A M).annihilator)) )
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-- lemma graded_local (𝒜 : ℤ → Type _) [SetLike (⨁ i, 𝒜 i)] (𝓜 : ℤ → Type _) [∀ i, AddCommGroup (𝒜 i)] [∀ i, AddCommGroup (𝓜 i)]
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-- [DirectSum.GCommRing 𝒜]
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-- [DirectSum.Gmodule 𝒜 𝓜] (art: IsArtinianRing (𝒜 0)) (loc : LocalRing (𝒜 0)) : ∃ ( I : Ideal ((⨁ i, 𝒜 i))),(HomogeneousMax 𝒜 I) := sorry
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def PolyType (f : ℤ → ℤ) (d : ℕ) := ∃ Poly : Polynomial ℚ, ∃ (N : ℤ), ∀ (n : ℤ), N ≤ n → f n = Polynomial.eval (n : ℚ) Poly ∧ d = Polynomial.degree Poly
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theorem hilbert_polynomial (𝒜 : ℤ → Type _) (𝓜 : ℤ → Type _) [∀ i, AddCommGroup (𝒜 i)] [∀ i, AddCommGroup (𝓜 i)]
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[DirectSum.GCommRing 𝒜]
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[DirectSum.Gmodule 𝒜 𝓜] (art: IsArtinianRing (𝒜 0)) (loc : LocalRing (𝒜 0)) (fingen : IsNoetherian (⨁ i, 𝒜 i) (⨁ i, 𝓜 i))
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(findim : ∃ d : ℕ , dimensionmodule (⨁ i, 𝒜 i) (⨁ i, 𝓜 i) = d):True := sorry
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-- Semiring A]
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-- variable [SetLike σ A]
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import Mathlib
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import Mathlib.RingTheory.Ideal.Basic
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import Mathlib.RingTheory.Ideal.Operations
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import Mathlib.LinearAlgebra.Finsupp
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import Mathlib.RingTheory.GradedAlgebra.Basic
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import Mathlib.RingTheory.GradedAlgebra.HomogeneousIdeal
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variable {R : Type _} (M A B C : Type _) [CommRing R] [AddCommGroup M] [Module R M] [AddCommGroup A] [Module R A] [AddCommGroup B] [Module R B] [AddCommGroup C] [Module R C]
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#check (A B : Submodule _ _) → (A ≤ B)
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#check Preorder (Submodule _ _)
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#check krullDim (Submodule _ _)
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noncomputable def length := Set.chainHeight {M' : Submodule R M | M' < ⊤}
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open LinearMap
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#check length M
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--lemma length_additive_shortexact {f : A ⟶ B} {g : B ⟶ C} (h : ShortExact f g) : length B = length A + length C := sorry
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import Mathlib.Order.KrullDimension
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import Mathlib.Order.JordanHolder
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import Mathlib.AlgebraicGeometry.PrimeSpectrum.Basic
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import Mathlib.Order.Height
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import Mathlib.RingTheory.Ideal.Basic
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import Mathlib.RingTheory.Ideal.Operations
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import Mathlib.LinearAlgebra.Finsupp
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import Mathlib.RingTheory.GradedAlgebra.Basic
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import Mathlib.RingTheory.GradedAlgebra.HomogeneousIdeal
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import Mathlib.Algebra.Module.GradedModule
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import Mathlib.RingTheory.Ideal.AssociatedPrime
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import Mathlib.RingTheory.Noetherian
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variable {ι σ R A : Type _}
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section HomogeneousDef
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variable [Semiring A]
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variable [SetLike σ A] [AddSubmonoidClass σ A] (𝒜 : ℤ → σ)
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variable [GradedRing 𝒜]
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variable (I : HomogeneousIdeal 𝒜)
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-- def Ideal.IsHomogeneous : Prop :=
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-- ∀ (i : ι) ⦃r : A⦄, r ∈ I → (DirectSum.decompose 𝒜 r i : A) ∈ I
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-- #align ideal.is_homogeneous Ideal.IsHomogeneous
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-- structure HomogeneousIdeal extends Submodule A A where
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-- is_homogeneous' : Ideal.IsHomogeneous 𝒜 toSubmodule
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--#check Ideal.IsPrime hI
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def HomogeneousPrime (I : Ideal A):= Ideal.IsPrime I
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def HomogeneousMax (I : Ideal A):= Ideal.IsMaximal I
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--theorem monotone_stabilizes_iff_noetherian :
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-- (∀ f : ℕ →o Submodule R M, ∃ n, ∀ m, n ≤ m → f n = f m) ↔ IsNoetherian R M := by
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-- rw [isNoetherian_iff_wellFounded, WellFounded.monotone_chain_condition]
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