awhecmu/canonical-drafter-extract-mathlib huggingface dataset:
-- Lean 4 proof step from Mathlib.CategoryTheory.Triangulated.Adjunction (goal)
Goal:
C : Type u_1
D : Type u_2
inst : Category.{v_1, u_1} C
inst_1 : Category.{v_2, u_2} D
inst_2 : HasZeroObject.{v_1, u_1} C
inst_3 : HasZeroObject.{v_2, u_2} D
inst_4 : Preadditive.{v_1, u_1} C
inst_5 : Preadditive.{v_2, u_2} D
inst_6 : HasShift.{v_1, u_1, 0} C ℤ
inst_7 : HasShift.{v_2, u_2, 0} D ℤ
inst_8 : ∀ (n : ℤ), Functor.Additive.{v_1, u_1, v_1, u_1} (shiftFunctor C n)
inst_9 : ∀ (n : ℤ), Functor.Additive.{v_2, u_2, v_2, u_2} (shiftFunctor D n)
inst_10 : Pretriangulated.{v_1, u_1} C
inst_11 : Pretriangulated.{v_2, u_2} D
F : Functor.{v_1, v_2, u_1, u_2} C D
G : Functor.{v_2, v_1, u_2, u_1} D C
adj : F ⊣ G
inst_12 : F.CommShift ℤ
inst_13 : G.CommShift ℤ
inst_14 : adj.CommShift ℤ
inst_15 : F.IsTriangulated
T : Triangle.{v_2, u_2} D
hT : Membership.mem (γ := Set (Triangle.{v_2, u_2} D)) (@distinguishedTriangles _ _ inst_3 _ inst_5 inst_9 _) T
this : G.Additive
Z : C
f : G.obj T.obj₂ ⟶ Z
g : Z ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₁)
mem :
  Membership.mem (γ := Set (Triangle.{v_1, u_1} C)) (@distinguishedTriangles _ _ inst_2 _ inst_4 inst_8 _)
    (Triangle.mk (G.map T.mor₁) f g)
h : F.obj Z ⟶ T.obj₃
h₁ : F.map f ≫ h = adj.counit.app T.obj₂ ≫ T.mor₂
h₂ :
  F.map g ≫
      NatTrans.app (Iso.hom (Functor.commShiftIso F 1)) (G.obj T.obj₁) ≫
        Functor.map (shiftFunctor D (A := ℤ) 1) (adj.counit.app T.obj₁) =
    h ≫ T.mor₃
h₁' : f ≫ adj.unit.app Z ≫ G.map h = G.map T.mor₂
h₂' :
  Eq (α := Z ⟶ (shiftFunctor D (A := ℤ) 1 ⋙ G).obj T.obj₁)
    (g ≫ NatTrans.app (Iso.inv (Functor.commShiftIso G 1)) T.obj₁)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h ≫
      G.map T.mor₃)
P : C
ψ : P ⟶ G.obj T.obj₂
hφ :
  Eq (α := P ⟶ G.obj T.obj₃)
    ((ψ ≫ f) ≫
      ((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h)
    0
α : F.obj P ⟶ T.obj₁
hα :
  ((Equiv.symm (adj.homEquiv P T.obj₂) : Equiv.{v_1 + 1, v_2 + 1} (P ⟶ G.obj T.obj₂) (F.obj P ⟶ T.obj₂)) :
        (a : P ⟶ G.obj T.obj₂) → F.obj P ⟶ T.obj₂)
      ψ =
    α ≫ T.mor₁
eq : ψ = adj.unit.app P ≫ G.map α ≫ G.map T.mor₁
eq' : G.map T.mor₁ ≫ f = 0
rw : (adj.unit.app P ≫ G.map α ≫ G.map T.mor₁) ≫ f = 0
rw₁ : adj.unit.app P ≫ (G.map α ≫ G.map T.mor₁) ≫ f = 0
rw₂ : adj.unit.app P ≫ G.map α ≫ G.map T.mor₁ ≫ f = 0
rw₃ : Eq (α := P ⟶ Z) (adj.unit.app P ≫ G.map α ≫ 0) 0
⊢ ψ ≫ f = 0
have rw₄ : Eq (α := P ⟶ Z) (adj.unit.app P ≫ 0) 0
Tactic: rw [eq, assoc, assoc, eq', comp_zero, comp_zero]
-- Lean 4 proof step from Mathlib.CategoryTheory.Triangulated.Adjunction (goal)
Goal:
C : Type u_1
D : Type u_2
inst : Category.{v_1, u_1} C
inst_1 : Category.{v_2, u_2} D
inst_2 : HasZeroObject.{v_1, u_1} C
inst_3 : HasZeroObject.{v_2, u_2} D
inst_4 : Preadditive.{v_1, u_1} C
inst_5 : Preadditive.{v_2, u_2} D
inst_6 : HasShift.{v_1, u_1, 0} C ℤ
inst_7 : HasShift.{v_2, u_2, 0} D ℤ
inst_8 : ∀ (n : ℤ), Functor.Additive.{v_1, u_1, v_1, u_1} (shiftFunctor C n)
inst_9 : ∀ (n : ℤ), Functor.Additive.{v_2, u_2, v_2, u_2} (shiftFunctor D n)
inst_10 : Pretriangulated.{v_1, u_1} C
inst_11 : Pretriangulated.{v_2, u_2} D
F : Functor.{v_1, v_2, u_1, u_2} C D
G : Functor.{v_2, v_1, u_2, u_1} D C
adj : F ⊣ G
inst_12 : F.CommShift ℤ
inst_13 : G.CommShift ℤ
inst_14 : adj.CommShift ℤ
inst_15 : F.IsTriangulated
T : Triangle.{v_2, u_2} D
hT : Membership.mem (γ := Set (Triangle.{v_2, u_2} D)) (@distinguishedTriangles _ _ inst_3 _ inst_5 inst_9 _) T
this : G.Additive
Z : C
f : G.obj T.obj₂ ⟶ Z
g : Z ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₁)
mem :
  Membership.mem (γ := Set (Triangle.{v_1, u_1} C)) (@distinguishedTriangles _ _ inst_2 _ inst_4 inst_8 _)
    (Triangle.mk (G.map T.mor₁) f g)
h : F.obj Z ⟶ T.obj₃
h₁ : F.map f ≫ h = adj.counit.app T.obj₂ ≫ T.mor₂
h₂ :
  F.map g ≫
      NatTrans.app (Iso.hom (Functor.commShiftIso F 1)) (G.obj T.obj₁) ≫
        Functor.map (shiftFunctor D (A := ℤ) 1) (adj.counit.app T.obj₁) =
    h ≫ T.mor₃
h₁' : f ≫ adj.unit.app Z ≫ G.map h = G.map T.mor₂
h₂' :
  Eq (α := Z ⟶ (shiftFunctor D (A := ℤ) 1 ⋙ G).obj T.obj₁)
    (g ≫ NatTrans.app (Iso.inv (Functor.commShiftIso G 1)) T.obj₁)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h ≫
      G.map T.mor₃)
P : C
ψ : P ⟶ G.obj T.obj₂
hφ :
  Eq (α := P ⟶ G.obj T.obj₃)
    ((ψ ≫ f) ≫
      ((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h)
    0
α : F.obj P ⟶ T.obj₁
hα :
  ((Equiv.symm (adj.homEquiv P T.obj₂) : Equiv.{v_1 + 1, v_2 + 1} (P ⟶ G.obj T.obj₂) (F.obj P ⟶ T.obj₂)) :
        (a : P ⟶ G.obj T.obj₂) → F.obj P ⟶ T.obj₂)
      ψ =
    α ≫ T.mor₁
eq : ψ = adj.unit.app P ≫ G.map α ≫ G.map T.mor₁
eq' : G.map T.mor₁ ≫ f = 0
rw : (adj.unit.app P ≫ G.map α ≫ G.map T.mor₁) ≫ f = 0
rw₁ : adj.unit.app P ≫ (G.map α ≫ G.map T.mor₁) ≫ f = 0
rw₂ : adj.unit.app P ≫ G.map α ≫ G.map T.mor₁ ≫ f = 0
rw₃ : Eq (α := P ⟶ Z) (adj.unit.app P ≫ G.map α ≫ 0) 0
rw₄ : Eq (α := P ⟶ Z) (adj.unit.app P ≫ 0) 0
⊢ ψ ≫ f = 0
have rw₅ : Eq.{v_1 + 1} (α := P ⟶ Z) 0 0
Tactic: rw [eq, assoc, assoc, eq', comp_zero, comp_zero]
-- Lean 4 proof step from Mathlib.CategoryTheory.Triangulated.Adjunction (goal)
Goal:
C : Type u_1
D : Type u_2
inst : Category.{v_1, u_1} C
inst_1 : Category.{v_2, u_2} D
inst_2 : HasZeroObject.{v_1, u_1} C
inst_3 : HasZeroObject.{v_2, u_2} D
inst_4 : Preadditive.{v_1, u_1} C
inst_5 : Preadditive.{v_2, u_2} D
inst_6 : HasShift.{v_1, u_1, 0} C ℤ
inst_7 : HasShift.{v_2, u_2, 0} D ℤ
inst_8 : ∀ (n : ℤ), Functor.Additive.{v_1, u_1, v_1, u_1} (shiftFunctor C n)
inst_9 : ∀ (n : ℤ), Functor.Additive.{v_2, u_2, v_2, u_2} (shiftFunctor D n)
inst_10 : Pretriangulated.{v_1, u_1} C
inst_11 : Pretriangulated.{v_2, u_2} D
F : Functor.{v_1, v_2, u_1, u_2} C D
G : Functor.{v_2, v_1, u_2, u_1} D C
adj : F ⊣ G
inst_12 : F.CommShift ℤ
inst_13 : G.CommShift ℤ
inst_14 : adj.CommShift ℤ
inst_15 : F.IsTriangulated
T : Triangle.{v_2, u_2} D
hT : Membership.mem (γ := Set (Triangle.{v_2, u_2} D)) (@distinguishedTriangles _ _ inst_3 _ inst_5 inst_9 _) T
this_1 : G.Additive
Z : C
f : G.obj T.obj₂ ⟶ Z
g : Z ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₁)
mem :
  Membership.mem (γ := Set (Triangle.{v_1, u_1} C)) (@distinguishedTriangles _ _ inst_2 _ inst_4 inst_8 _)
    (Triangle.mk (G.map T.mor₁) f g)
h : F.obj Z ⟶ T.obj₃
h₁ : F.map f ≫ h = adj.counit.app T.obj₂ ≫ T.mor₂
h₂ :
  F.map g ≫
      NatTrans.app (Iso.hom (Functor.commShiftIso F 1)) (G.obj T.obj₁) ≫
        Functor.map (shiftFunctor D (A := ℤ) 1) (adj.counit.app T.obj₁) =
    h ≫ T.mor₃
h₁' : f ≫ adj.unit.app Z ≫ G.map h = G.map T.mor₂
h₂' :
  Eq (α := Z ⟶ (shiftFunctor D (A := ℤ) 1 ⋙ G).obj T.obj₁)
    (g ≫ NatTrans.app (Iso.inv (Functor.commShiftIso G 1)) T.obj₁)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h ≫
      G.map T.mor₃)
this :
  Mono.{v_1, u_1} (X := Z)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h :
      Z ⟶ G.obj T.obj₃)
Y : C
⊢ Function.Bijective (β := Y ⟶ G.obj T.obj₃) fun (x : Y ⟶ Z) ↦
    x ≫
      ((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h
have left : Function.Injective (β := Y ⟶ G.obj T.obj₃) fun (x : Y ⟶ Z) ↦
  x ≫
    ((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
        (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
      h
Tactic: constructor
-- Lean 4 proof step from Mathlib.CategoryTheory.Triangulated.Adjunction (goal)
Goal:
C : Type u_1
D : Type u_2
inst : Category.{v_1, u_1} C
inst_1 : Category.{v_2, u_2} D
inst_2 : HasZeroObject.{v_1, u_1} C
inst_3 : HasZeroObject.{v_2, u_2} D
inst_4 : Preadditive.{v_1, u_1} C
inst_5 : Preadditive.{v_2, u_2} D
inst_6 : HasShift.{v_1, u_1, 0} C ℤ
inst_7 : HasShift.{v_2, u_2, 0} D ℤ
inst_8 : ∀ (n : ℤ), Functor.Additive.{v_1, u_1, v_1, u_1} (shiftFunctor C n)
inst_9 : ∀ (n : ℤ), Functor.Additive.{v_2, u_2, v_2, u_2} (shiftFunctor D n)
inst_10 : Pretriangulated.{v_1, u_1} C
inst_11 : Pretriangulated.{v_2, u_2} D
F : Functor.{v_1, v_2, u_1, u_2} C D
G : Functor.{v_2, v_1, u_2, u_1} D C
adj : F ⊣ G
inst_12 : F.CommShift ℤ
inst_13 : G.CommShift ℤ
inst_14 : adj.CommShift ℤ
inst_15 : F.IsTriangulated
T : Triangle.{v_2, u_2} D
hT : Membership.mem (γ := Set (Triangle.{v_2, u_2} D)) (@distinguishedTriangles _ _ inst_3 _ inst_5 inst_9 _) T
this_1 : G.Additive
Z : C
f : G.obj T.obj₂ ⟶ Z
g : Z ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₁)
mem :
  Membership.mem (γ := Set (Triangle.{v_1, u_1} C)) (@distinguishedTriangles _ _ inst_2 _ inst_4 inst_8 _)
    (Triangle.mk (G.map T.mor₁) f g)
h : F.obj Z ⟶ T.obj₃
h₁ : F.map f ≫ h = adj.counit.app T.obj₂ ≫ T.mor₂
h₂ :
  F.map g ≫
      NatTrans.app (Iso.hom (Functor.commShiftIso F 1)) (G.obj T.obj₁) ≫
        Functor.map (shiftFunctor D (A := ℤ) 1) (adj.counit.app T.obj₁) =
    h ≫ T.mor₃
h₁' : f ≫ adj.unit.app Z ≫ G.map h = G.map T.mor₂
h₂' :
  Eq (α := Z ⟶ (shiftFunctor D (A := ℤ) 1 ⋙ G).obj T.obj₁)
    (g ≫ NatTrans.app (Iso.inv (Functor.commShiftIso G 1)) T.obj₁)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h ≫
      G.map T.mor₃)
this :
  Mono.{v_1, u_1} (X := Z)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h :
      Z ⟶ G.obj T.obj₃)
Y : C
left :
  Function.Injective (β := Y ⟶ G.obj T.obj₃) fun (x : Y ⟶ Z) ↦
    x ≫
      ((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h
⊢ Function.Bijective (β := Y ⟶ G.obj T.obj₃) fun (x : Y ⟶ Z) ↦
    x ≫
      ((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h
have right : Function.Surjective (β := Y ⟶ G.obj T.obj₃) fun (x : Y ⟶ Z) ↦
  x ≫
    ((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
        (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
      h
Tactic: constructor
-- Lean 4 proof step from Mathlib.CategoryTheory.Triangulated.Adjunction (goal)
Goal:
C : Type u_1
D : Type u_2
inst : Category.{v_1, u_1} C
inst_1 : Category.{v_2, u_2} D
inst_2 : HasZeroObject.{v_1, u_1} C
inst_3 : HasZeroObject.{v_2, u_2} D
inst_4 : Preadditive.{v_1, u_1} C
inst_5 : Preadditive.{v_2, u_2} D
inst_6 : HasShift.{v_1, u_1, 0} C ℤ
inst_7 : HasShift.{v_2, u_2, 0} D ℤ
inst_8 : ∀ (n : ℤ), Functor.Additive.{v_1, u_1, v_1, u_1} (shiftFunctor C n)
inst_9 : ∀ (n : ℤ), Functor.Additive.{v_2, u_2, v_2, u_2} (shiftFunctor D n)
inst_10 : Pretriangulated.{v_1, u_1} C
inst_11 : Pretriangulated.{v_2, u_2} D
F : Functor.{v_1, v_2, u_1, u_2} C D
G : Functor.{v_2, v_1, u_2, u_1} D C
adj : F ⊣ G
inst_12 : F.CommShift ℤ
inst_13 : G.CommShift ℤ
inst_14 : adj.CommShift ℤ
inst_15 : F.IsTriangulated
T : Triangle.{v_2, u_2} D
hT : Membership.mem (γ := Set (Triangle.{v_2, u_2} D)) (@distinguishedTriangles _ _ inst_3 _ inst_5 inst_9 _) T
this_1 : G.Additive
Z : C
f : G.obj T.obj₂ ⟶ Z
g : Z ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₁)
mem :
  Membership.mem (γ := Set (Triangle.{v_1, u_1} C)) (@distinguishedTriangles _ _ inst_2 _ inst_4 inst_8 _)
    (Triangle.mk (G.map T.mor₁) f g)
h : F.obj Z ⟶ T.obj₃
h₁ : F.map f ≫ h = adj.counit.app T.obj₂ ≫ T.mor₂
h₂ :
  F.map g ≫
      NatTrans.app (Iso.hom (Functor.commShiftIso F 1)) (G.obj T.obj₁) ≫
        Functor.map (shiftFunctor D (A := ℤ) 1) (adj.counit.app T.obj₁) =
    h ≫ T.mor₃
h₁' : f ≫ adj.unit.app Z ≫ G.map h = G.map T.mor₂
h₂' :
  Eq (α := Z ⟶ (shiftFunctor D (A := ℤ) 1 ⋙ G).obj T.obj₁)
    (g ≫ NatTrans.app (Iso.inv (Functor.commShiftIso G 1)) T.obj₁)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h ≫
      G.map T.mor₃)
this :
  Mono.{v_1, u_1} (X := Z)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h :
      Z ⟶ G.obj T.obj₃)
Y : C
φ : Y ⟶ G.obj T.obj₃
⊢ Eq (α := Y ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (Triangle.mk (G.map T.mor₁) f g).obj₂)
    ((φ ≫ G.map T.mor₃ ≫ NatTrans.app (Iso.hom (Functor.commShiftIso G 1)) T.obj₁) ≫
      Functor.map (shiftFunctor C (A := ℤ) 1) (Triangle.mk (G.map T.mor₁) f g).mor₁)
    0
have dsimp : Eq (α := Y ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₂))
  ((φ ≫ G.map T.mor₃ ≫ NatTrans.app (Iso.hom (Functor.commShiftIso G 1)) T.obj₁) ≫
    Functor.map (shiftFunctor C (A := ℤ) 1) (G.map T.mor₁))
  0
Tactic: dsimp
-- Lean 4 proof step from Mathlib.CategoryTheory.Triangulated.Adjunction (goal)
Goal:
C : Type u_1
D : Type u_2
inst : Category.{v_1, u_1} C
inst_1 : Category.{v_2, u_2} D
inst_2 : HasZeroObject.{v_1, u_1} C
inst_3 : HasZeroObject.{v_2, u_2} D
inst_4 : Preadditive.{v_1, u_1} C
inst_5 : Preadditive.{v_2, u_2} D
inst_6 : HasShift.{v_1, u_1, 0} C ℤ
inst_7 : HasShift.{v_2, u_2, 0} D ℤ
inst_8 : ∀ (n : ℤ), Functor.Additive.{v_1, u_1, v_1, u_1} (shiftFunctor C n)
inst_9 : ∀ (n : ℤ), Functor.Additive.{v_2, u_2, v_2, u_2} (shiftFunctor D n)
inst_10 : Pretriangulated.{v_1, u_1} C
inst_11 : Pretriangulated.{v_2, u_2} D
F : Functor.{v_1, v_2, u_1, u_2} C D
G : Functor.{v_2, v_1, u_2, u_1} D C
adj : F ⊣ G
inst_12 : F.CommShift ℤ
inst_13 : G.CommShift ℤ
inst_14 : adj.CommShift ℤ
inst_15 : F.IsTriangulated
T : Triangle.{v_2, u_2} D
hT : Membership.mem (γ := Set (Triangle.{v_2, u_2} D)) (@distinguishedTriangles _ _ inst_3 _ inst_5 inst_9 _) T
this_1 : G.Additive
Z : C
f : G.obj T.obj₂ ⟶ Z
g : Z ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₁)
mem :
  Membership.mem (γ := Set (Triangle.{v_1, u_1} C)) (@distinguishedTriangles _ _ inst_2 _ inst_4 inst_8 _)
    (Triangle.mk (G.map T.mor₁) f g)
h : F.obj Z ⟶ T.obj₃
h₁ : F.map f ≫ h = adj.counit.app T.obj₂ ≫ T.mor₂
h₂ :
  F.map g ≫
      NatTrans.app (Iso.hom (Functor.commShiftIso F 1)) (G.obj T.obj₁) ≫
        Functor.map (shiftFunctor D (A := ℤ) 1) (adj.counit.app T.obj₁) =
    h ≫ T.mor₃
h₁' : f ≫ adj.unit.app Z ≫ G.map h = G.map T.mor₂
h₂' :
  Eq (α := Z ⟶ (shiftFunctor D (A := ℤ) 1 ⋙ G).obj T.obj₁)
    (g ≫ NatTrans.app (Iso.inv (Functor.commShiftIso G 1)) T.obj₁)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h ≫
      G.map T.mor₃)
this :
  Mono.{v_1, u_1} (X := Z)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h :
      Z ⟶ G.obj T.obj₃)
Y : C
φ : Y ⟶ G.obj T.obj₃
⊢ Eq (α := Y ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₂))
    ((φ ≫ G.map T.mor₃ ≫ NatTrans.app (Iso.hom (Functor.commShiftIso G 1)) T.obj₁) ≫
      Functor.map (shiftFunctor C (A := ℤ) 1) (G.map T.mor₁))
    0
have rw : Eq (α := Y ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₂))
  (φ ≫
    (G.map T.mor₃ ≫ NatTrans.app (Iso.hom (Functor.commShiftIso G 1)) T.obj₁) ≫
      Functor.map (shiftFunctor C (A := ℤ) 1) (G.map T.mor₁))
  0
Tactic: rw [assoc, assoc, ← G.commShiftIso_hom_naturality, ← G.map_comp_assoc,
              comp_distTriang_mor_zero₃₁ _ hT, G.map_zero, zero_comp, comp_zero]
-- Lean 4 proof step from Mathlib.CategoryTheory.Triangulated.Adjunction (goal)
Goal:
C : Type u_1
D : Type u_2
inst : Category.{v_1, u_1} C
inst_1 : Category.{v_2, u_2} D
inst_2 : HasZeroObject.{v_1, u_1} C
inst_3 : HasZeroObject.{v_2, u_2} D
inst_4 : Preadditive.{v_1, u_1} C
inst_5 : Preadditive.{v_2, u_2} D
inst_6 : HasShift.{v_1, u_1, 0} C ℤ
inst_7 : HasShift.{v_2, u_2, 0} D ℤ
inst_8 : ∀ (n : ℤ), Functor.Additive.{v_1, u_1, v_1, u_1} (shiftFunctor C n)
inst_9 : ∀ (n : ℤ), Functor.Additive.{v_2, u_2, v_2, u_2} (shiftFunctor D n)
inst_10 : Pretriangulated.{v_1, u_1} C
inst_11 : Pretriangulated.{v_2, u_2} D
F : Functor.{v_1, v_2, u_1, u_2} C D
G : Functor.{v_2, v_1, u_2, u_1} D C
adj : F ⊣ G
inst_12 : F.CommShift ℤ
inst_13 : G.CommShift ℤ
inst_14 : adj.CommShift ℤ
inst_15 : F.IsTriangulated
T : Triangle.{v_2, u_2} D
hT : Membership.mem (γ := Set (Triangle.{v_2, u_2} D)) (@distinguishedTriangles _ _ inst_3 _ inst_5 inst_9 _) T
this_1 : G.Additive
Z : C
f : G.obj T.obj₂ ⟶ Z
g : Z ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₁)
mem :
  Membership.mem (γ := Set (Triangle.{v_1, u_1} C)) (@distinguishedTriangles _ _ inst_2 _ inst_4 inst_8 _)
    (Triangle.mk (G.map T.mor₁) f g)
h : F.obj Z ⟶ T.obj₃
h₁ : F.map f ≫ h = adj.counit.app T.obj₂ ≫ T.mor₂
h₂ :
  F.map g ≫
      NatTrans.app (Iso.hom (Functor.commShiftIso F 1)) (G.obj T.obj₁) ≫
        Functor.map (shiftFunctor D (A := ℤ) 1) (adj.counit.app T.obj₁) =
    h ≫ T.mor₃
h₁' : f ≫ adj.unit.app Z ≫ G.map h = G.map T.mor₂
h₂' :
  Eq (α := Z ⟶ (shiftFunctor D (A := ℤ) 1 ⋙ G).obj T.obj₁)
    (g ≫ NatTrans.app (Iso.inv (Functor.commShiftIso G 1)) T.obj₁)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h ≫
      G.map T.mor₃)
this :
  Mono.{v_1, u_1} (X := Z)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h :
      Z ⟶ G.obj T.obj₃)
Y : C
φ : Y ⟶ G.obj T.obj₃
rw :
  Eq (α := Y ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₂))
    (φ ≫
      (G.map T.mor₃ ≫ NatTrans.app (Iso.hom (Functor.commShiftIso G 1)) T.obj₁) ≫
        Functor.map (shiftFunctor C (A := ℤ) 1) (G.map T.mor₁))
    0
⊢ Eq (α := Y ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₂))
    ((φ ≫ G.map T.mor₃ ≫ NatTrans.app (Iso.hom (Functor.commShiftIso G 1)) T.obj₁) ≫
      Functor.map (shiftFunctor C (A := ℤ) 1) (G.map T.mor₁))
    0
have rw₁ : Eq (α := Y ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₂))
  (φ ≫
    G.map T.mor₃ ≫
      NatTrans.app (Iso.hom (Functor.commShiftIso G 1)) T.obj₁ ≫ Functor.map (shiftFunctor C (A := ℤ) 1) (G.map T.mor₁))
  0
Tactic: rw [assoc, assoc, ← G.commShiftIso_hom_naturality, ← G.map_comp_assoc,
              comp_distTriang_mor_zero₃₁ _ hT, G.map_zero, zero_comp, comp_zero]
-- Lean 4 proof step from Mathlib.CategoryTheory.Triangulated.Adjunction (goal)
Goal:
C : Type u_1
D : Type u_2
inst : Category.{v_1, u_1} C
inst_1 : Category.{v_2, u_2} D
inst_2 : HasZeroObject.{v_1, u_1} C
inst_3 : HasZeroObject.{v_2, u_2} D
inst_4 : Preadditive.{v_1, u_1} C
inst_5 : Preadditive.{v_2, u_2} D
inst_6 : HasShift.{v_1, u_1, 0} C ℤ
inst_7 : HasShift.{v_2, u_2, 0} D ℤ
inst_8 : ∀ (n : ℤ), Functor.Additive.{v_1, u_1, v_1, u_1} (shiftFunctor C n)
inst_9 : ∀ (n : ℤ), Functor.Additive.{v_2, u_2, v_2, u_2} (shiftFunctor D n)
inst_10 : Pretriangulated.{v_1, u_1} C
inst_11 : Pretriangulated.{v_2, u_2} D
F : Functor.{v_1, v_2, u_1, u_2} C D
G : Functor.{v_2, v_1, u_2, u_1} D C
adj : F ⊣ G
inst_12 : F.CommShift ℤ
inst_13 : G.CommShift ℤ
inst_14 : adj.CommShift ℤ
inst_15 : F.IsTriangulated
T : Triangle.{v_2, u_2} D
hT : Membership.mem (γ := Set (Triangle.{v_2, u_2} D)) (@distinguishedTriangles _ _ inst_3 _ inst_5 inst_9 _) T
this_1 : G.Additive
Z : C
f : G.obj T.obj₂ ⟶ Z
g : Z ⟶ Functor.obj.{v_1, v_1, u_1, u_1} (shiftFunctor C (A := ℤ) 1) (G.obj T.obj₁)
mem :
  Membership.mem (γ := Set (Triangle.{v_1, u_1} C)) (@distinguishedTriangles _ _ inst_2 _ inst_4 inst_8 _)
    (Triangle.mk (G.map T.mor₁) f g)
h : F.obj Z ⟶ T.obj₃
h₁ : F.map f ≫ h = adj.counit.app T.obj₂ ≫ T.mor₂
h₂ :
  F.map g ≫
      NatTrans.app (Iso.hom (Functor.commShiftIso F 1)) (G.obj T.obj₁) ≫
        Functor.map (shiftFunctor D (A := ℤ) 1) (adj.counit.app T.obj₁) =
    h ≫ T.mor₃
h₁' : f ≫ adj.unit.app Z ≫ G.map h = G.map T.mor₂
h₂' :
  Eq (α := Z ⟶ (shiftFunctor D (A := ℤ) 1 ⋙ G).obj T.obj₁)
    (g ≫ NatTrans.app (Iso.inv (Functor.commShiftIso G 1)) T.obj₁)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h ≫
      G.map T.mor₃)
this :
  Mono.{v_1, u_1} (X := Z)
    (((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
          (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
        h :
      Z ⟶ G.obj T.obj₃)
Y : C
φ : Y ⟶ G.obj T.obj₃
⊢ ∃ (a : Y ⟶ Z),
    (fun (x : Y ⟶ Z) ↦
          (x ≫
              ((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
                  (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
                h :
            Y ⟶ G.obj T.obj₃))
        a =
      φ
have right : ∀ (ψ : Y ⟶ (Triangle.mk (G.map T.mor₁) f g).obj₃)
  (hψ :
    φ ≫ G.map T.mor₃ ≫ NatTrans.app (Iso.hom (Functor.commShiftIso G 1)) T.obj₁ =
      ψ ≫ (Triangle.mk (G.map T.mor₁) f g).mor₃),
  ∃ (a : Y ⟶ Z),
    (fun (x : Y ⟶ Z) ↦
          (x ≫
              ((adj.homEquiv Z T.obj₃ : Equiv.{v_2 + 1, v_1 + 1} (F.obj Z ⟶ T.obj₃) (Z ⟶ G.obj T.obj₃)) :
                  (a : F.obj Z ⟶ T.obj₃) → Z ⟶ G.obj T.obj₃)
                h :
            Y ⟶ G.obj T.obj₃))
        a =
      φ
Tactic: obtain ⟨ψ, hψ⟩ := Triangle.coyoneda_exact₁ _ mem (φ ≫ G.map T.mor₃ ≫
          (G.commShiftIso (1 : ℤ)).hom.app T.obj₁) (by
            dsimp
            rw [assoc, assoc, ← G.commShiftIso_hom_naturality, ← G.map_comp_assoc,
              comp_distTriang_mor_zero₃₁ _ hT, G.map_zero, zero_comp, comp_zero])