Theorem: CategoryTheory.Functor.homologySequence_exact₂
File: Mathlib/CategoryTheory/Triangulated/HomologicalFunctor.lean

tactic: refine' ShortComplex.exact_of_iso _ (F.map_distinguished_exact _
  (Triangle.shift_distinguished _ hT n₀))
state_before: C : Type u_1
D : Type u_2
A : Type u_3
inst✝¹⁶ : Category.{u_5, u_1} C
inst✝¹⁵ : HasZeroObject C
inst✝¹⁴ : HasShift C ℤ
inst✝¹³ : Preadditive C
inst✝¹² : ∀ (n : ℤ), (shiftFunctor C n).Additive
inst✝¹¹ : Pretriangulated C
inst✝¹⁰ : Category.{?u.57183, u_2} D
inst✝⁹ : HasZeroObject D
inst✝⁸ : HasShift D ℤ
inst✝⁷ : Preadditive D
inst✝⁶ : ∀ (n : ℤ), (shiftFunctor D n).Additive
inst✝⁵ : Pretriangulated D
inst✝⁴ : Category.{u_4, u_3} A
inst✝³ : Abelian A
F : C ⥤ A
inst✝² inst✝¹ : F.IsHomological
inst✝ : F.ShiftSequence ℤ
T T' : Triangle C
hT : T ∈ distinguishedTriangles
hT' : T' ∈ distinguishedTriangles
φ : T ⟶ T'
n₀ n₁ : ℤ
h : n₀ + 1 = n₁
⊢ (ShortComplex.mk ((F.shift n₀).map T.mor₁) ((F.shift n₀).map T.mor₂) ⋯).Exact
state_after: C : Type u_1
D : Type u_2
A : Type u_3
inst✝¹⁶ : Category.{u_5, u_1} C
inst✝¹⁵ : HasZeroObject C
inst✝¹⁴ : HasShift C ℤ
inst✝¹³ : Preadditive C
inst✝¹² : ∀ (n : ℤ), (shiftFunctor C n).Additive
inst✝¹¹ : Pretriangulated C
inst✝¹⁰ : Category.{?u.57183, u_2} D
inst✝⁹ : HasZeroObject D
inst✝⁸ : HasShift D ℤ
inst✝⁷ : Preadditive D
inst✝⁶ : ∀ (n : ℤ), (shiftFunctor D n).Additive
inst✝⁵ : Pretriangulated D
inst✝⁴ : Category.{u_4, u_3} A
inst✝³ : Abelian A
F : C ⥤ A
inst✝² inst✝¹ : F.IsHomological
inst✝ : F.ShiftSequence ℤ
T T' : Triangle C
hT : T ∈ distinguishedTriangles
hT' : T' ∈ distinguishedTriangles
φ : T ⟶ T'
n₀ n₁ : ℤ
h : n₀ + 1 = n₁
⊢ (shortComplexOfDistTriangle ((shiftFunctor (Triangle C) n₀).obj T) ⋯).map F ≅
    ShortComplex.mk ((F.shift n₀).map T.mor₁) ((F.shift n₀).map T.mor₂) ⋯

tactic: exact ShortComplex.isoMk ((F.isoShift n₀).app _)
  (n₀.negOnePow • ((F.isoShift n₀).app _)) ((F.isoShift n₀).app _) (by simp) (by simp)
state_before: C : Type u_1
D : Type u_2
A : Type u_3
inst✝¹⁶ : Category.{u_5, u_1} C
inst✝¹⁵ : HasZeroObject C
inst✝¹⁴ : HasShift C ℤ
inst✝¹³ : Preadditive C
inst✝¹² : ∀ (n : ℤ), (shiftFunctor C n).Additive
inst✝¹¹ : Pretriangulated C
inst✝¹⁰ : Category.{?u.57183, u_2} D
inst✝⁹ : HasZeroObject D
inst✝⁸ : HasShift D ℤ
inst✝⁷ : Preadditive D
inst✝⁶ : ∀ (n : ℤ), (shiftFunctor D n).Additive
inst✝⁵ : Pretriangulated D
inst✝⁴ : Category.{u_4, u_3} A
inst✝³ : Abelian A
F : C ⥤ A
inst✝² inst✝¹ : F.IsHomological
inst✝ : F.ShiftSequence ℤ
T T' : Triangle C
hT : T ∈ distinguishedTriangles
hT' : T' ∈ distinguishedTriangles
φ : T ⟶ T'
n₀ n₁ : ℤ
h : n₀ + 1 = n₁
⊢ (shortComplexOfDistTriangle ((shiftFunctor (Triangle C) n₀).obj T) ⋯).map F ≅
    ShortComplex.mk ((F.shift n₀).map T.mor₁) ((F.shift n₀).map T.mor₂) ⋯
state_after: no goals

tactic: simp
state_before: C : Type u_1
D : Type u_2
A : Type u_3
inst✝¹⁶ : Category.{u_5, u_1} C
inst✝¹⁵ : HasZeroObject C
inst✝¹⁴ : HasShift C ℤ
inst✝¹³ : Preadditive C
inst✝¹² : ∀ (n : ℤ), (shiftFunctor C n).Additive
inst✝¹¹ : Pretriangulated C
inst✝¹⁰ : Category.{?u.57183, u_2} D
inst✝⁹ : HasZeroObject D
inst✝⁸ : HasShift D ℤ
inst✝⁷ : Preadditive D
inst✝⁶ : ∀ (n : ℤ), (shiftFunctor D n).Additive
inst✝⁵ : Pretriangulated D
inst✝⁴ : Category.{u_4, u_3} A
inst✝³ : Abelian A
F : C ⥤ A
inst✝² inst✝¹ : F.IsHomological
inst✝ : F.ShiftSequence ℤ
T T' : Triangle C
hT : T ∈ distinguishedTriangles
hT' : T' ∈ distinguishedTriangles
φ : T ⟶ T'
n₀ n₁ : ℤ
h : n₀ + 1 = n₁
⊢ ((F.isoShift n₀).app T.obj₁).hom ≫ (ShortComplex.mk ((F.shift n₀).map T.mor₁) ((F.shift n₀).map T.mor₂) ⋯).f =
    ((shortComplexOfDistTriangle ((shiftFunctor (Triangle C) n₀).obj T) ⋯).map F).f ≫
      (n₀.negOnePow • (F.isoShift n₀).app T.obj₂).hom
state_after: no goals

tactic: simp
state_before: C : Type u_1
D : Type u_2
A : Type u_3
inst✝¹⁶ : Category.{u_5, u_1} C
inst✝¹⁵ : HasZeroObject C
inst✝¹⁴ : HasShift C ℤ
inst✝¹³ : Preadditive C
inst✝¹² : ∀ (n : ℤ), (shiftFunctor C n).Additive
inst✝¹¹ : Pretriangulated C
inst✝¹⁰ : Category.{?u.57183, u_2} D
inst✝⁹ : HasZeroObject D
inst✝⁸ : HasShift D ℤ
inst✝⁷ : Preadditive D
inst✝⁶ : ∀ (n : ℤ), (shiftFunctor D n).Additive
inst✝⁵ : Pretriangulated D
inst✝⁴ : Category.{u_4, u_3} A
inst✝³ : Abelian A
F : C ⥤ A
inst✝² inst✝¹ : F.IsHomological
inst✝ : F.ShiftSequence ℤ
T T' : Triangle C
hT : T ∈ distinguishedTriangles
hT' : T' ∈ distinguishedTriangles
φ : T ⟶ T'
n₀ n₁ : ℤ
h : n₀ + 1 = n₁
⊢ (n₀.negOnePow • (F.isoShift n₀).app T.obj₂).hom ≫
      (ShortComplex.mk ((F.shift n₀).map T.mor₁) ((F.shift n₀).map T.mor₂) ⋯).g =
    ((shortComplexOfDistTriangle ((shiftFunctor (Triangle C) n₀).obj T) ⋯).map F).g ≫ ((F.isoShift n₀).app T.obj₃).hom
state_after: no goals