mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: case refine_1.transitive
C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X✝ : C
S✝ : Sieve X✝
X : C
S T : Sieve X
hS : J.Saturate X S
hT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → J.Saturate Y (Sieve.pullback f T)
hleT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → ∃ R ∈ J.coverings Y, R ≤ (Sieve.pullback f T).arrows
R : Presieve X
hR : ∃ 𝒰, R = Presieve.ofArrows 𝒰.X 𝒰.f
hle : R ≤ S.arrows
⊢ ∃ R ∈ J.coverings X, R ≤ T.arrows

Tactic:
]

Goal state after:
case refine_1.transitive
C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X✝ : C
S✝ : Sieve X✝
X : C
S T : Sieve X
hS : J.Saturate X S
hT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → J.Saturate Y (Sieve.pullback f T)
hleT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → ∃ R ∈ J.coverings Y, R ≤ (Sieve.pullback f T).arrows
R : Presieve X
hR : ∃ 𝒰, R = Presieve.ofArrows 𝒰.X 𝒰.f
hle : R ≤ S.arrows
⊢ ∃ R ∈ J.coverings X, R ≤ T.arrows
Module: Mathlib.CategoryTheory.Sites.Continuous

Goal state before:
pp: case refine_2
C : Type u₁
inst✝³ : Category.{v₁, u₁} C
D : Type u₂
inst✝² : Category.{v₂, u₂} D
X : C
E : PreOneHypercover X
F : C ⥤ D
i₁ i₂ : E.I₀
inst✝¹ : HasPullback (E.f i₁) (E.f i₂)
inst✝ : PreservesLimit (cospan (E.f i₁) (E.f i₂)) F
this : HasPullback ((E.map F).f i₁) ((E.map F).f i₂)
⊢ Sieve.pullback (pullback.lift (F.map (pullback.fst (E.f i₁) (E.f i₂))) (F.map (pullback.snd (E.f i₁) (E.f i₂))) ⋯)
      ((E.map F).sieve₁' i₁ i₂) ≤
    Sieve.functorPushforward F (E.sieve₁' i₁ i₂)

Tactic:
]

Goal state after:
case refine_2
C : Type u₁
inst✝³ : Category.{v₁, u₁} C
D : Type u₂
inst✝² : Category.{v₂, u₂} D
X : C
E : PreOneHypercover X
F : C ⥤ D
i₁ i₂ : E.I₀
inst✝¹ : HasPullback (E.f i₁) (E.f i₂)
inst✝ : PreservesLimit (cospan (E.f i₁) (E.f i₂)) F
this : HasPullback ((E.map F).f i₁) ((E.map F).f i₂)
⊢ Sieve.pullback (pullback.lift (F.map (pullback.fst (E.f i₁) (E.f i₂))) (F.map (pullback.snd (E.f i₁) (E.f i₂))) ⋯)
      ((E.map F).sieve₁' i₁ i₂) ≤
    Sieve.functorPushforward F (E.sieve₁' i₁ i₂)
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X✝ : C
S✝ : Sieve X✝
X : C
S T : Sieve X
hS : J.Saturate X S
hT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → J.Saturate Y (Sieve.pullback f T)
hleT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → ∃ R ∈ J.coverings Y, R ≤ (Sieve.pullback f T).arrows
E : J.ZeroHypercover X
hle : Presieve.ofArrows E.X E.f ≤ S.arrows
i : E.I₀
R' : Presieve (E.X i)
hR' : ∃ 𝒰, R' = Presieve.ofArrows 𝒰.X 𝒰.f
hle' : R' ≤ (Sieve.pullback (E.f i) T).arrows
⊢ ∃ F, F.presieve₀ ≤ (Sieve.pullback (E.f i) T).arrows

Tactic:
]

Goal state after:
C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X✝ : C
S✝ : Sieve X✝
X : C
S T : Sieve X
hS : J.Saturate X S
hT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → J.Saturate Y (Sieve.pullback f T)
hleT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → ∃ R ∈ J.coverings Y, R ≤ (Sieve.pullback f T).arrows
E : J.ZeroHypercover X
hle : Presieve.ofArrows E.X E.f ≤ S.arrows
i : E.I₀
R' : Presieve (E.X i)
hR' : ∃ 𝒰, R' = Presieve.ofArrows 𝒰.X 𝒰.f
hle' : R' ≤ (Sieve.pullback (E.f i) T).arrows
⊢ ∃ F, F.presieve₀ ≤ (Sieve.pullback (E.f i) T).arrows
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: case refine_1.transitive
C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X✝ : C
S✝ : Sieve X✝
X : C
S T : Sieve X
hS : J.Saturate X S
hT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → J.Saturate Y (Sieve.pullback f T)
E : J.ZeroHypercover X
hle : Presieve.ofArrows E.X E.f ≤ S.arrows
F : (i : E.I₀) → J.ZeroHypercover (E.X i)
hle' : ∀ (i : E.I₀), (F i).presieve₀ ≤ (Sieve.pullback (E.f i) T).arrows
⊢ ∀ (i : (E.bind F).I₀), T.arrows ((E.bind F).f i)

Tactic:
]

Goal state after:
case refine_1.transitive
C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X✝ : C
S✝ : Sieve X✝
X : C
S T : Sieve X
hS : J.Saturate X S
hT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → J.Saturate Y (Sieve.pullback f T)
E : J.ZeroHypercover X
hle : Presieve.ofArrows E.X E.f ≤ S.arrows
F : (i : E.I₀) → J.ZeroHypercover (E.X i)
hle' : ∀ (i : E.I₀), (F i).presieve₀ ≤ (Sieve.pullback (E.f i) T).arrows
⊢ ∀ (i : (E.bind F).I₀), T.arrows ((E.bind F).f i)
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: case refine_1.transitive
C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X✝ : C
S✝ : Sieve X✝
X : C
S T : Sieve X
hS : J.Saturate X S
hT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → J.Saturate Y (Sieve.pullback f T)
E : J.ZeroHypercover X
hle : Presieve.ofArrows E.X E.f ≤ S.arrows
F : (i : E.I₀) → J.ZeroHypercover (E.X i)
hle' : ∀ (i : E.I₀), (F i).presieve₀ ≤ (Sieve.pullback (E.f i) T).arrows
⊢ (E.bind F).presieve₀ ≤ T.arrows

Tactic:
rw [Presieve.ofArrows_le_iff]

Goal state after:
case refine_1.transitive
C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X✝ : C
S✝ : Sieve X✝
X : C
S T : Sieve X
hS : J.Saturate X S
hT : ∀ ⦃Y : C⦄ ⦃f : Y ⟶ X⦄, S.arrows f → J.Saturate Y (Sieve.pullback f T)
E : J.ZeroHypercover X
hle : Presieve.ofArrows E.X E.f ≤ S.arrows
F : (i : E.I₀) → J.ZeroHypercover (E.X i)
hle' : ∀ (i : E.I₀), (F i).presieve₀ ≤ (Sieve.pullback (E.f i) T).arrows
⊢ ∀ (i : (E.bind F).I₀), T.arrows ((E.bind F).f i)
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: case refine_2
C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X : C
S : Sieve X
x✝ : ∃ R ∈ J.coverings X, R ≤ S.arrows
R : Presieve X
hR : R ∈ J.coverings X
hle : Sieve.generate R ≤ S
⊢ S ∈ J.toGrothendieck X

Tactic:
]

Goal state after:
case refine_2
C : Type u_2
inst✝⁴ : Category.{u_1, u_2} C
J : Precoverage C
inst✝³ : J.IsStableUnderComposition
inst✝² : J.IsStableUnderBaseChange
inst✝¹ : J.HasPullbacks
inst✝ : J.HasIsos
X : C
S : Sieve X
x✝ : ∃ R ∈ J.coverings X, R ≤ S.arrows
R : Presieve X
hR : R ∈ J.coverings X
hle : Sieve.generate R ≤ S
⊢ S ∈ J.toGrothendieck X
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_3
inst✝ : Category.{u_2, u_3} C
J : Precoverage C
P : Cᵒᵖ ⥤ Type u_1
h : ∀ {X Y : C} {f : Y ⟶ X}, ∀ R ∈ J.coverings X, IsSheafFor P (Sieve.pullback f (Sieve.generate R)).arrows
S : C
R : Presieve S
hR : R ∈ J.coverings S
⊢ IsSheafFor P R

Tactic:
]

Goal state after:
C : Type u_3
inst✝ : Category.{u_2, u_3} C
J : Precoverage C
P : Cᵒᵖ ⥤ Type u_1
h : ∀ {X Y : C} {f : Y ⟶ X}, ∀ R ∈ J.coverings X, IsSheafFor P (Sieve.pullback f (Sieve.generate R)).arrows
S : C
R : Presieve S
hR : R ∈ J.coverings S
⊢ IsSheafFor P R
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_3
inst✝ : Category.{u_2, u_3} C
F : Cᵒᵖ ⥤ Type u_1
S : C
𝒰 𝒱 : PreZeroHypercover S
e : 𝒰 ≅ 𝒱
⊢ Presieve.IsSheafFor F (Presieve.ofArrows 𝒱.X 𝒱.f) ↔ Presieve.IsSheafFor F 𝒱.presieve₀

Tactic:
]

Goal state after:
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_3
inst✝ : Category.{u_2, u_3} C
F : Cᵒᵖ ⥤ Type u_1
S X Y : C
g : Y ⟶ S
e : X ≅ Y
⊢ IsSheafFor F (ofArrows (fun i ↦ Y) fun x ↦ g) ↔ IsSheafFor F (ofArrows (fun x ↦ Y) fun x ↦ g)

Tactic:
]

Goal state after:
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
⊢ IsSheafFor (F.op ⋙ P) (ofArrows Y f) ↔ IsSheafFor P (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i))

Tactic:
]

Goal state after:
C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
⊢ IsSheafFor (F.op ⋙ P) (ofArrows Y f) ↔ IsSheafFor P (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i))
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
x : (i : ι) → P.obj (Opposite.op (F.obj (Y i)))
⊢ ((∀ (a b : ι), ?m.131 a b) → ∃! t, ∀ (i : ι), (ConcreteCategory.hom (P.map (F.map (f i)).op)) t = x i) ↔
    (∀ (i j : ι),
        (ConcreteCategory.hom (P.map (pullback.fst (F.map (f i)) (F.map (f j))).op)) (x i) =
          (ConcreteCategory.hom (P.map (pullback.snd (F.map (f i)) (F.map (f j))).op)) (x j)) →
      ∃! t, ∀ (i : ι), (ConcreteCategory.hom (P.map (F.map (f i)).op)) t = x i

pp: C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
x : (i : ι) → P.obj (Opposite.op (F.obj (Y i)))
⊢ ∀ (a b : ι),
    (ConcreteCategory.hom (P.map (F.map (pullback.fst (f a) (f b))).op)) (x a) =
        (ConcreteCategory.hom (P.map (F.map (pullback.snd (f a) (f b))).op)) (x b) ↔
      ?m.131 a b

pp: C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
x : (i : ι) → P.obj (Opposite.op (F.obj (Y i)))
⊢ ι → ι → Prop

Tactic:
]

Goal state after:
C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
x : (i : ι) → P.obj (Opposite.op (F.obj (Y i)))
⊢ ∀ (a b : ι),
    (ConcreteCategory.hom (P.map (F.map (pullback.fst (f a) (f b))).op)) (x a) =
        (ConcreteCategory.hom (P.map (F.map (pullback.snd (f a) (f b))).op)) (x b) ↔
      (ConcreteCategory.hom (P.map (pullback.fst (F.map (f a)) (F.map (f b))).op)) (x a) =
        (ConcreteCategory.hom (P.map (pullback.snd (F.map (f a)) (F.map (f b))).op)) (x b)
Module: Mathlib.CategoryTheory.Sites.Continuous

Goal state before:
pp: C : Type u₁
inst✝³ : Category.{v₁, u₁} C
D : Type u₂
inst✝² : Category.{v₂, u₂} D
X : C
E : PreOneHypercover X
F : C ⥤ D
W : C
i₁ i₂ : E.I₀
p₁ : W ⟶ E.X i₁
p₂ : W ⟶ E.X i₂
h : p₁ ≫ E.f i₁ = p₂ ≫ E.f i₂
inst✝¹ : HasPullbacks C
inst✝ : PreservesLimitsOfShape WalkingCospan F
⊢ Sieve.functorPushforward F (E.sieve₁ p₁ p₂) = (E.map F).sieve₁ (F.map p₁) (F.map p₂)

Tactic:
refine le_antisymm (PreOneHypercover.functorPushforward_sieve₁_map_le _ _ _) ?_
  have : HasPullback ((E.map F).f i₁) ((E.map F).f i₂) :=
    hasPullback_of_preservesPullback F (E.f i₁) (E.f i₂)
  rintro T f ⟨k, u, hf₁, hf₂⟩
  let l : W ⟶ pullback (E.f i₁) (E.f i₂) := pullback.lift p₁ p₂ h
  have hl₁ : l ≫ pullback.fst _ _ = p₁ := by simp [l]
  have hl₂ : l ≫ pullback.snd _ _ = p₂ := by simp [l]
  let r : E.Y k ⟶ pullback (E.f i₁) (E.f i₂) := pullback.lift (E.p₁ _) (E.p₂ _) (E.w _)
  refine ⟨pullback l r, pullback.fst _ _, IsPullback.lift
    (IsPullback.map _ (.of_hasPullback _ _)) f u ?_, ?_, ?_⟩
  · apply (IsPullback.map _ (.of_hasPullback _ _)).hom_ext <;>
      simp [l, r, ← Functor.map_comp, hf₁, hf₂]
  · refine ⟨k, pullback.snd _ _, ?_, ?_⟩ <;> simp [← hl₁, ← hl₂, pullback.condition_assoc, r]
  · simp

Goal state after:
Module: Mathlib.CategoryTheory.Sites.Continuous

Goal state before:
pp: C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
J : GrothendieckTopology C
K : GrothendieckTopology D
F : C ⥤ D
H : (Cᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)) ⥤ Dᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
adj : H ⊣ (whiskeringLeft Cᵒᵖ Dᵒᵖ (Type (max u₁ v₁ u₂ v₂))).obj F.op
inst✝ : F.IsContinuous J K
G G' : Cᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
f : G ⟶ G'
hf : J.W f
U : Dᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
hU : Presheaf.IsSheaf K U
⊢ Function.Bijective fun g ↦ f ≫ g

Tactic:
]

Goal state after:
C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
J : GrothendieckTopology C
K : GrothendieckTopology D
F : C ⥤ D
H : (Cᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)) ⥤ Dᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
adj : H ⊣ (whiskeringLeft Cᵒᵖ Dᵒᵖ (Type (max u₁ v₁ u₂ v₂))).obj F.op
inst✝ : F.IsContinuous J K
G G' : Cᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
f : G ⟶ G'
hf : J.W f
U : Dᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
hU : Presheaf.IsSheaf K U
⊢ Function.Bijective fun g ↦ f ≫ g
Module: Mathlib.CategoryTheory.Sites.Continuous

Goal state before:
pp: C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
J : GrothendieckTopology C
K : GrothendieckTopology D
F : C ⥤ D
H : (Cᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)) ⥤ Dᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
adj : H ⊣ (whiskeringLeft Cᵒᵖ Dᵒᵖ (Type (max u₁ v₁ u₂ v₂))).obj F.op
inst✝ : F.IsContinuous J K
G G' : Cᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
f : G ⟶ G'
hf : J.W f
U : Dᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
hU : Presheaf.IsSheaf K U
⊢ Presieve.IsSheaf J (((whiskeringLeft Cᵒᵖ Dᵒᵖ (Type (max u₁ v₁ u₂ v₂))).obj F.op).obj U)

Tactic:
]

Goal state after:
C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
J : GrothendieckTopology C
K : GrothendieckTopology D
F : C ⥤ D
H : (Cᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)) ⥤ Dᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
adj : H ⊣ (whiskeringLeft Cᵒᵖ Dᵒᵖ (Type (max u₁ v₁ u₂ v₂))).obj F.op
inst✝ : F.IsContinuous J K
G G' : Cᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
f : G ⟶ G'
hf : J.W f
U : Dᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)
hU : Presheaf.IsSheaf K U
⊢ Presieve.IsSheaf J (((whiskeringLeft Cᵒᵖ Dᵒᵖ (Type (max u₁ v₁ u₂ v₂))).obj F.op).obj U)
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this✝¹ : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
x : (i : ι) → P.obj (Opposite.op (F.obj (Y i)))
i j : ι
this✝ : PreservesLimit (cospan (f i) (f j)) F
this : HasPullback (F.map (f i)) (F.map (f j))
⊢ (ConcreteCategory.hom
          (P.map (pullback.fst (F.map (f i)) (F.map (f j))).op ≫ P.map (pullbackComparison F (f i) (f j)).op))
        (x i) =
      (ConcreteCategory.hom
          (P.map (pullback.snd (F.map (f i)) (F.map (f j))).op ≫ P.map (pullbackComparison F (f i) (f j)).op))
        (x j) ↔
    (ConcreteCategory.hom (P.map (pullback.fst (F.map (f i)) (F.map (f j))).op)) (x i) =
      (ConcreteCategory.hom (P.map (pullback.snd (F.map (f i)) (F.map (f j))).op)) (x j)

Tactic:
]

Goal state after:
C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this✝¹ : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
x : (i : ι) → P.obj (Opposite.op (F.obj (Y i)))
i j : ι
this✝ : PreservesLimit (cospan (f i) (f j)) F
this : HasPullback (F.map (f i)) (F.map (f j))
⊢ (ConcreteCategory.hom
          (P.map (pullback.fst (F.map (f i)) (F.map (f j))).op ≫ P.map (pullbackComparison F (f i) (f j)).op))
        (x i) =
      (ConcreteCategory.hom
          (P.map (pullback.snd (F.map (f i)) (F.map (f j))).op ≫ P.map (pullbackComparison F (f i) (f j)).op))
        (x j) ↔
    (ConcreteCategory.hom (P.map (pullback.fst (F.map (f i)) (F.map (f j))).op)) (x i) =
      (ConcreteCategory.hom (P.map (pullback.snd (F.map (f i)) (F.map (f j))).op)) (x j)
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this✝¹ : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
x : (i : ι) → P.obj (Opposite.op (F.obj (Y i)))
i j : ι
this✝ : PreservesLimit (cospan (f i) (f j)) F
this : HasPullback (F.map (f i)) (F.map (f j))
⊢ IsIso (P.map (pullbackComparison F (f i) (f j)).op)

Tactic:
]

Goal state after:
C : Type u_4
inst✝³ : Category.{u_3, u_4} C
D : Type u_1
inst✝² : Category.{v_1, u_1} D
F : C ⥤ D
P : Dᵒᵖ ⥤ Type u_2
X : C
ι : Type (max u_4 u_3)
Y : ι → C
f : (i : ι) → Y i ⟶ X
inst✝¹ : (ofArrows Y f).HasPairwisePullbacks
inst✝ : F.PreservesPairwisePullbacks (ofArrows Y f)
this✝¹ : (ofArrows (fun i ↦ F.obj (Y i)) fun i ↦ F.map (f i)).HasPairwisePullbacks
x : (i : ι) → P.obj (Opposite.op (F.obj (Y i)))
i j : ι
this✝ : PreservesLimit (cospan (f i) (f j)) F
this : HasPullback (F.map (f i)) (F.map (f j))
⊢ IsIso (P.map (pullbackComparison F (f i) (f j)).op)
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_3
inst✝ : Category.{u_2, u_3} C
J : GrothendieckTopology C
S : C
R : Sieve S
⊢ R ∈ J S ↔ R ∈ J S

Tactic:
]

Goal state after:
Module: Mathlib.CategoryTheory.Sites.Continuous

Goal state before:
pp: C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
J : GrothendieckTopology C
K : GrothendieckTopology D
F : C ⥤ D
inst✝ : F.IsContinuous J K
G : Dᵒᵖ ⥤ Type (max w u₁ v₁ u₂ v₂)
hG : Presieve.IsSheaf K G
H : (Cᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂)) ⥤ Dᵒᵖ ⥤ Type (max u₁ v₁ u₂ v₂) := F.op.lan
adj : H ⊣ (whiskeringLeft Cᵒᵖ Dᵒᵖ (Type (max u₁ v₁ u₂ v₂))).obj F.op := F.op.lanAdjunction (Type (max u₁ v₁ u₂ v₂))
H' : (Cᵒᵖ ⥤ Type (max w u₁ v₁ u₂ v₂)) ⥤ Dᵒᵖ ⥤ Type (max w u₁ v₁ u₂ v₂) := F.op.lan
adj' : H' ⊣ (whiskeringLeft Cᵒᵖ Dᵒᵖ (Type (max w u₁ v₁ u₂ v₂))).obj F.op :=
  F.op.lanAdjunction (Type (max w u₁ v₁ u₂ v₂))
X : C
S : Sieve X
hS : S ∈ J X
hWS : J.W (Sieve.shrinkFunctor.{max u₁ v₁ u₂ v₂, v₁, u₁} S).ι
this : K.W (H.map (Sieve.shrinkFunctor.{max u₁ v₁ u₂ v₂, v₁, u₁} S).ι)
e : H ⋙
    (whiskeringRight Dᵒᵖ (Type (max u₁ v₁ u₂ v₂)) (Type (max (max (max (max u₁ u₂) v₁) v₂) w))).obj
      uliftFunctor.{w, max (max (max u₁ u₂) v₁) v₂} ≅
  (whiskeringRight Cᵒᵖ (Type (max u₁ v₁ u₂ v₂)) (Type (max (max (max (max u₁ u₂) v₁) v₂) w))).obj
      uliftFunctor.{w, max (max (max u₁ u₂) v₁) v₂} ⋙
    H' :=
  uliftFunctor.{w, max (max (max u₁ u₂) v₁) v₂}.lanCompIsoOfPreserves F.op
⊢ H'.map ((Sieve.shrinkFunctor.{max w (max (max u₁ u₂) v₁) v₂, v₁, u₁} S).ι ≫ shrinkYonedaUliftFunctorIso.inv.app X) ≫
      e.inv.app (shrinkYoneda.{max u₁ v₁ u₂ v₂, v₁, u₁}.obj X) =
    H'.map ((Sieve.shrinkFunctor.{max w u₁ v₁ u₂ v₂, v₁, u₁} S).ι ≫ shrinkYonedaUliftFunctorIso.inv.app X) ≫
      e.inv.app (shrinkYoneda.{max u₁ v₁ u₂ v₂, v₁, u₁}.obj X)

Tactic:
]

Goal state after:
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_3
inst✝¹ : Category.{u_2, u_3} C
D : Type u_1
inst✝ : Category.{v_1, u_1} D
J : GrothendieckTopology C
ι : Type (max u_3 u_2)
S : C
X : ι → C
f : (i : ι) → X i ⟶ S
hf : Presieve.ofArrows X f ∈ J.toPrecoverage.coverings S
σ : ι → Type (max u_3 u_2)
Y : (i : ι) → σ i → C
g : (i : ι) → (j : σ i) → Y i j ⟶ X i
hg : ∀ (i : ι), Presieve.ofArrows (Y i) (g i) ∈ J.toPrecoverage.coverings (X i)
⊢ Sieve.generate (Presieve.bindOfArrows X f fun i ↦ Presieve.ofArrows (Y i) (g i)) ∈ J S

Tactic:
]

Goal state after:
C : Type u_3
inst✝¹ : Category.{u_2, u_3} C
D : Type u_1
inst✝ : Category.{v_1, u_1} D
J : GrothendieckTopology C
ι : Type (max u_3 u_2)
S : C
X : ι → C
f : (i : ι) → X i ⟶ S
hf : Presieve.ofArrows X f ∈ J.toPrecoverage.coverings S
σ : ι → Type (max u_3 u_2)
Y : (i : ι) → σ i → C
g : (i : ι) → (j : σ i) → Y i j ⟶ X i
hg : ∀ (i : ι), Presieve.ofArrows (Y i) (g i) ∈ J.toPrecoverage.coverings (X i)
⊢ Sieve.generate (Presieve.bindOfArrows X f fun i ↦ Presieve.ofArrows (Y i) (g i)) ∈ J S
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: C : Type u_3
inst✝¹ : Category.{u_2, u_3} C
D : Type u_1
inst✝ : Category.{v_1, u_1} D
J : GrothendieckTopology C
ι : Type (max u_3 u_2)
S : C
X : ι → C
f : (i : ι) → X i ⟶ S
hf : Presieve.ofArrows X f ∈ J.toPrecoverage.coverings S
Y : C
g : Y ⟶ S
P : ι → C
p₁ : (i : ι) → P i ⟶ Y
p₂ : (i : ι) → P i ⟶ X i
h : ∀ (i : ι), IsPullback (p₁ i) (p₂ i) g (f i)
⊢ Sieve.pullback g (Sieve.ofArrows X f) ∈ J Y

Tactic:
]

Goal state after:
C : Type u_3
inst✝¹ : Category.{u_2, u_3} C
D : Type u_1
inst✝ : Category.{v_1, u_1} D
J : GrothendieckTopology C
ι : Type (max u_3 u_2)
S : C
X : ι → C
f : (i : ι) → X i ⟶ S
hf : Presieve.ofArrows X f ∈ J.toPrecoverage.coverings S
Y : C
g : Y ⟶ S
P : ι → C
p₁ : (i : ι) → P i ⟶ Y
p₂ : (i : ι) → P i ⟶ X i
h : ∀ (i : ι), IsPullback (p₁ i) (p₂ i) g (f i)
⊢ Sieve.pullback g (Sieve.ofArrows X f) ∈ J Y
Module: Mathlib.CategoryTheory.Sites.PrecoverageToGrothendieck

Goal state before:
pp: case refine_1
C : Type u_2
inst✝ : Category.{u_3, u_2} C
K : Precoverage C
J : GrothendieckTopology C
h : K.toGrothendieck ≤ J
X : C
R : Presieve X
hR : R ∈ K.coverings X
⊢ Sieve.generate R ∈ J X

Tactic:
]

Goal state after:
case refine_1
C : Type u_2
inst✝ : Category.{u_3, u_2} C
K : Precoverage C
J : GrothendieckTopology C
h : K.toGrothendieck ≤ J
X : C
R : Presieve X
hR : R ∈ K.coverings X
⊢ Sieve.generate R ∈ J X
Module: Mathlib.CategoryTheory.Sites.Continuous

Goal state before:
pp: C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
F : C ⥤ D
J : GrothendieckTopology C
K : GrothendieckTopology D
inst✝ : F.IsContinuous J K
G : Sheaf K (Type t)
⊢ Presieve.IsSheaf J (F.op ⋙ G.obj ⋙ uliftFunctor.{max u₁ v₁ u₂ v₂, t})

Tactic:
]

Goal state after:
C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
F : C ⥤ D
J : GrothendieckTopology C
K : GrothendieckTopology D
inst✝ : F.IsContinuous J K
G : Sheaf K (Type t)
⊢ Presieve.IsSheaf J (F.op ⋙ G.obj ⋙ uliftFunctor.{max u₁ v₁ u₂ v₂, t})
Module: Mathlib.CategoryTheory.Sites.Continuous

Goal state before:
pp: C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
F : C ⥤ D
J : GrothendieckTopology C
K : GrothendieckTopology D
inst✝ : F.IsContinuous J K
G : Sheaf K (Type t)
⊢ Presheaf.IsSheaf K G.obj

Tactic:
]

Goal state after:
C : Type u₁
inst✝² : Category.{v₁, u₁} C
D : Type u₂
inst✝¹ : Category.{v₂, u₂} D
F : C ⥤ D
J : GrothendieckTopology C
K : GrothendieckTopology D
inst✝ : F.IsContinuous J K
G : Sheaf K (Type t)
⊢ Presheaf.IsSheaf K G.obj