mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.CategoryTheory.Localization.CalculusOfFractions

Goal state before:
pp: C : Type u_1
D : Type u_2
inst✝³ : Category.{v_1, u_1} C
inst✝² : Category.{v_2, u_2} D
L : C ⥤ D
W : MorphismProperty C
inst✝¹ : L.IsLocalization W
inst✝ : W.HasLeftCalculusOfFractions
X Y : C
E : MorphismProperty.LeftFraction.Localization W ≌ D := uniq (MorphismProperty.LeftFraction.Localization.Q W) L W
e : MorphismProperty.LeftFraction.Localization.Q W ⋙ E.functor ≅ L :=
  compUniqFunctor (MorphismProperty.LeftFraction.Localization.Q W) L W
g : W.LeftFraction X Y
⊢ e.inv.app X ≫ E.functor.map (MorphismProperty.LeftFraction.Localization.homMk g) ≫ e.hom.app Y = g.map L ⋯

Tactic:
MorphismProperty.LeftFraction.Localization.homMk_eq g,

Goal state after:
C : Type u_1
D : Type u_2
inst✝³ : Category.{v_1, u_1} C
inst✝² : Category.{v_2, u_2} D
L : C ⥤ D
W : MorphismProperty C
inst✝¹ : L.IsLocalization W
inst✝ : W.HasLeftCalculusOfFractions
X Y : C
E : MorphismProperty.LeftFraction.Localization W ≌ D := uniq (MorphismProperty.LeftFraction.Localization.Q W) L W
e : MorphismProperty.LeftFraction.Localization.Q W ⋙ E.functor ≅ L :=
  compUniqFunctor (MorphismProperty.LeftFraction.Localization.Q W) L W
g : W.LeftFraction X Y
⊢ e.inv.app X ≫ E.functor.map (g.map (MorphismProperty.LeftFraction.Localization.Q W) ⋯) ≫ e.hom.app Y = g.map L ⋯
Module: Mathlib.CategoryTheory.Localization.Triangulated

Goal state before:
pp: C : Type u_1
D : Type u_2
inst✝¹¹ : Category.{v_1, u_1} C
inst✝¹⁰ : Category.{v_2, u_2} D
L : C ⥤ D
inst✝⁹ : HasShift C ℤ
inst✝⁸ : Preadditive C
inst✝⁷ : HasZeroObject C
inst✝⁶ : ∀ (n : ℤ), (shiftFunctor C n).Additive
inst✝⁵ : Pretriangulated C
inst✝⁴ : HasShift D ℤ
inst✝³ : L.CommShift ℤ
W : MorphismProperty C
inst✝² : L.IsLocalization W
inst✝¹ : W.HasLeftCalculusOfFractions
inst✝ : W.IsCompatibleWithTriangulation
T₁ T₂ : Triangle C
hT₁ : T₁ ∈ distinguishedTriangles
hT₂ : T₂ ∈ distinguishedTriangles
a : L.obj T₁.obj₁ ⟶ L.obj T₂.obj₁
b : L.obj T₁.obj₂ ⟶ L.obj T₂.obj₂
fac✝ : L.map T₁.mor₁ ≫ b = a ≫ L.map T₂.mor₁
α : W.LeftFraction T₁.obj₁ T₂.obj₁
hα : a = α.map L ⋯
β : W.LeftFraction α.Y' T₂.obj₂
hβ : T₂.mor₁ ≫ β.s = α.s ≫ β.f
γ : W.LeftFraction T₁.obj₂ β.Y'
hγ : b ≫ L.map β.s = γ.map L ⋯
Z₂ : C
σ : γ.Y' ⟶ Z₂
hσ : W σ
fac : α.f ≫ β.f ≫ γ.s ≫ σ = T₁.mor₁ ≫ γ.f ≫ σ
Y₃ : C
g : Z₂ ⟶ Y₃
h : Y₃ ⟶ (shiftFunctor C 1).obj α.Y'
T₃ : Triangle C := Triangle.mk (β.f ≫ γ.s ≫ σ) g h
hT₃ : T₃ ∈ distinguishedTriangles
hβγσ : W (β.s ≫ γ.s ≫ σ)
⊢ T₂.mor₁ ≫ β.s ≫ γ.s ≫ σ = α.s ≫ T₃.mor₁

Tactic:
by dsimp [T₃]; rw [reassoc_of% hβ]

Goal state after:
Module: Mathlib.CategoryTheory.Localization.CalculusOfFractions

Goal state before:
pp: case mp
C : Type u_1
D : Type u_2
inst✝³ : Category.{v_1, u_1} C
inst✝² : Category.{v_2, u_2} D
L : C ⥤ D
W : MorphismProperty C
inst✝¹ : L.IsLocalization W
inst✝ : W.HasLeftCalculusOfFractions
X Y : C
f₁ f₂ : X ⟶ Y
⊢ L.map f₁ = L.map f₂ → ∃ Z s, ∃ (_ : W s), f₁ ≫ s = f₂ ≫ s

pp: case mpr
C : Type u_1
D : Type u_2
inst✝³ : Category.{v_1, u_1} C
inst✝² : Category.{v_2, u_2} D
L : C ⥤ D
W : MorphismProperty C
inst✝¹ : L.IsLocalization W
inst✝ : W.HasLeftCalculusOfFractions
X Y : C
f₁ f₂ : X ⟶ Y
⊢ (∃ Z s, ∃ (_ : W s), f₁ ≫ s = f₂ ≫ s) → L.map f₁ = L.map f₂

Tactic:
· intro h
    rw [← LeftFraction.map_ofHom W _ L (Localization.inverts _ _),
      ← LeftFraction.map_ofHom W _ L (Localization.inverts _ _),
      LeftFraction.map_eq_iff] at h
    obtain ⟨Z, t₁, t₂, hst, hft, ht⟩ := h
    dsimp at t₁ t₂ hst hft ht
    grind

Goal state after:
case mpr
C : Type u_1
D : Type u_2
inst✝³ : Category.{v_1, u_1} C
inst✝² : Category.{v_2, u_2} D
L : C ⥤ D
W : MorphismProperty C
inst✝¹ : L.IsLocalization W
inst✝ : W.HasLeftCalculusOfFractions
X Y : C
f₁ f₂ : X ⟶ Y
⊢ (∃ Z s, ∃ (_ : W s), f₁ ≫ s = f₂ ≫ s) → L.map f₁ = L.map f₂
Module: Mathlib.CategoryTheory.Localization.Triangulated

Goal state before:
pp: C : Type u_1
D : Type u_2
inst✝¹¹ : Category.{v_1, u_1} C
inst✝¹⁰ : Category.{v_2, u_2} D
L : C ⥤ D
inst✝⁹ : HasShift C ℤ
inst✝⁸ : Preadditive C
inst✝⁷ : HasZeroObject C
inst✝⁶ : ∀ (n : ℤ), (shiftFunctor C n).Additive
inst✝⁵ : Pretriangulated C
inst✝⁴ : HasShift D ℤ
inst✝³ : L.CommShift ℤ
W : MorphismProperty C
inst✝² : L.IsLocalization W
inst✝¹ : W.HasLeftCalculusOfFractions
inst✝ : W.IsCompatibleWithTriangulation
T₁ T₂ : Triangle C
hT₁ : T₁ ∈ distinguishedTriangles
hT₂ : T₂ ∈ distinguishedTriangles
a : L.obj T₁.obj₁ ⟶ L.obj T₂.obj₁
b : L.obj T₁.obj₂ ⟶ L.obj T₂.obj₂
fac✝ : L.map T₁.mor₁ ≫ b = a ≫ L.map T₂.mor₁
α : W.LeftFraction T₁.obj₁ T₂.obj₁
hα : a = α.map L ⋯
β : W.LeftFraction α.Y' T₂.obj₂
hβ : T₂.mor₁ ≫ β.s = α.s ≫ β.f
γ : W.LeftFraction T₁.obj₂ β.Y'
hγ : b ≫ L.map β.s = γ.map L ⋯
Z₂ : C
σ : γ.Y' ⟶ Z₂
hσ : W σ
fac : α.f ≫ β.f ≫ γ.s ≫ σ = T₁.mor₁ ≫ γ.f ≫ σ
Y₃ : C
g : Z₂ ⟶ Y₃
h : Y₃ ⟶ (shiftFunctor C 1).obj α.Y'
T₃ : Triangle C := Triangle.mk (β.f ≫ γ.s ≫ σ) g h
hT₃ : T₃ ∈ distinguishedTriangles
hβγσ : W (β.s ≫ γ.s ≫ σ)
ψ₃ : T₂.obj₃ ⟶ T₃.obj₃
hψ₃ : W ψ₃
hψ₁ : T₂.mor₂ ≫ ψ₃ = (β.s ≫ γ.s ≫ σ) ≫ T₃.mor₂
hψ₂ : T₂.mor₃ ≫ (shiftFunctor C 1).map α.s = ψ₃ ≫ T₃.mor₃
⊢ T₂.mor₁ ≫ β.s ≫ γ.s ≫ σ = α.s ≫ T₃.mor₁

Tactic:
by dsimp [T₃]; rw [reassoc_of% hβ]

Goal state after:
Module: Mathlib.CategoryTheory.MorphismProperty.Retract

Goal state before:
pp: case refine_1
C : Type u
inst✝ : Category.{v, u} C
X Y Z W : C
f : X ⟶ Y
g : Z ⟶ W
h : RetractArrow f g
x✝ : IsIso g
⊢ f ≫ Arrow.Hom.right h.i ≫ inv g ≫ Arrow.Hom.left h.r = 𝟙 X

pp: case refine_2
C : Type u
inst✝ : Category.{v, u} C
X Y Z W : C
f : X ⟶ Y
g : Z ⟶ W
h : RetractArrow f g
x✝ : IsIso g
⊢ (Arrow.Hom.right h.i ≫ inv g ≫ Arrow.Hom.left h.r) ≫ f = 𝟙 Y

Tactic:
· rw [← h.i_w_assoc, IsIso.hom_inv_id_assoc, h.retract_left]

Goal state after:
case refine_2
C : Type u
inst✝ : Category.{v, u} C
X Y Z W : C
f : X ⟶ Y
g : Z ⟶ W
h : RetractArrow f g
x✝ : IsIso g
⊢ (Arrow.Hom.right h.i ≫ inv g ≫ Arrow.Hom.left h.r) ≫ f = 𝟙 Y
Module: Mathlib.Algebra.Homology.QuasiIso

Goal state before:
pp: ι : Type u_1
c : ComplexShape ι
C₁ : Type u_2
C₂ : Type u_3
inst✝¹⁰ : Category.{v_1, u_2} C₁
inst✝⁹ : Category.{v_2, u_3} C₂
inst✝⁸ : Preadditive C₁
inst✝⁷ : Preadditive C₂
K L : HomologicalComplex C₁ c
φ : K ⟶ L
F : C₁ ⥤ C₂
inst✝⁶ : F.Additive
inst✝⁵ : F.PreservesHomology
i : ι
inst✝⁴ : K.HasHomology i
inst✝³ : L.HasHomology i
inst✝² : ((F.mapHomologicalComplex c).obj K).HasHomology i
inst✝¹ : ((F.mapHomologicalComplex c).obj L).HasHomology i
inst✝ : F.ReflectsIsomorphisms
⊢ QuasiIsoAt ((F.mapHomologicalComplex c).map φ) i ↔ QuasiIsoAt φ i

Tactic:
simp only [quasiIsoAt_iff]

Goal state after:
ι : Type u_1
c : ComplexShape ι
C₁ : Type u_2
C₂ : Type u_3
inst✝¹⁰ : Category.{v_1, u_2} C₁
inst✝⁹ : Category.{v_2, u_3} C₂
inst✝⁸ : Preadditive C₁
inst✝⁷ : Preadditive C₂
K L : HomologicalComplex C₁ c
φ : K ⟶ L
F : C₁ ⥤ C₂
inst✝⁶ : F.Additive
inst✝⁵ : F.PreservesHomology
i : ι
inst✝⁴ : K.HasHomology i
inst✝³ : L.HasHomology i
inst✝² : ((F.mapHomologicalComplex c).obj K).HasHomology i
inst✝¹ : ((F.mapHomologicalComplex c).obj L).HasHomology i
inst✝ : F.ReflectsIsomorphisms
⊢ ShortComplex.QuasiIso ((shortComplexFunctor C₂ c i).map ((F.mapHomologicalComplex c).map φ)) ↔
    ShortComplex.QuasiIso ((shortComplexFunctor C₁ c i).map φ)
Module: Mathlib.CategoryTheory.Triangulated.Subcategory

Goal state before:
pp: case refine_2
C : Type u_1
inst✝¹⁵ : Category.{v_1, u_1} C
inst✝¹⁴ : HasZeroObject C
inst✝¹³ : HasShift C ℤ
inst✝¹² : Preadditive C
inst✝¹¹ : ∀ (n : ℤ), (shiftFunctor C n).Additive
inst✝¹⁰ : Pretriangulated C
D : Type u_2
inst✝⁹ : Category.{v_2, u_2} D
inst✝⁸ : Preadditive D
inst✝⁷ : HasZeroObject D
inst✝⁶ : HasShift D ℤ
inst✝⁵ : ∀ (n : ℤ), (shiftFunctor D n).Additive
inst✝⁴ : Pretriangulated D
E : Type u_3
inst✝³ : Category.{v_3, u_3} E
inst✝² : HasShift E ℤ
P : ObjectProperty C
inst✝¹ : IsTriangulated C
inst✝ : P.IsTriangulated
Y Z✝ Z' : C
f₁ f₂ : Y ⟶ Z✝
s : Z✝ ⟶ Z'
hf₁ : f₁ ≫ s = f₂ ≫ s
Z : C
g : Z ⟶ Z✝
h : Z' ⟶ (shiftFunctor C 1).obj Z
H : Triangle.mk g s h ∈ distinguishedTriangles
mem : P Z
hf₂ : (f₁ - f₂) ≫ s = 0
q : Y ⟶ (Triangle.mk g s h).obj₁
hq : f₁ - f₂ = q ≫ (Triangle.mk g s h).mor₁
Y' : C
r : Y' ⟶ Y
t : (Triangle.mk g s h).obj₁ ⟶ (shiftFunctor C 1).obj Y'
mem' : Triangle.mk r q t ∈ distinguishedTriangles
eq : r ≫ q = 0
⊢ r ≫ f₁ = r ≫ f₂

Tactic:
rw [← sub_eq_zero, ← comp_sub, hq, reassoc_of% eq, zero_comp]

Goal state after:
Module: Mathlib.Algebra.Homology.Opposite

Goal state before:
pp: ι : Type u_1
V : Type u_2
inst✝³ : Category.{v_1, u_2} V
c : ComplexShape ι
inst✝² : HasZeroMorphisms V
K L : HomologicalComplex V c
φ : K ⟶ L
i : ι
inst✝¹ : K.HasHomology i
inst✝ : L.HasHomology i
⊢ QuasiIsoAt ((opFunctor V c).map φ.op) i ↔ QuasiIsoAt φ i

Tactic:
simp only [quasiIsoAt_iff]

Goal state after:
ι : Type u_1
V : Type u_2
inst✝³ : Category.{v_1, u_2} V
c : ComplexShape ι
inst✝² : HasZeroMorphisms V
K L : HomologicalComplex V c
φ : K ⟶ L
i : ι
inst✝¹ : K.HasHomology i
inst✝ : L.HasHomology i
⊢ ShortComplex.QuasiIso ((shortComplexFunctor Vᵒᵖ c.symm i).map ((opFunctor V c).map φ.op)) ↔
    ShortComplex.QuasiIso ((shortComplexFunctor V c i).map φ)
Module: Mathlib.Algebra.Homology.Embedding.Boundary

Goal state before:
pp: case left
ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
e : c.Embedding c'
i' : ι'
j : ι
hj : c'.Rel i' (e.f j)
hi' : ∀ (i : ι), e.f i ≠ i'
⊢ c'.Rel (c'.prev (e.f j)) (e.f j)

Tactic:
simpa only [c'.prev_eq' hj] using hj

Goal state after:
Module: Mathlib.Algebra.Homology.Embedding.HomEquiv

Goal state before:
pp: ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
e : c.Embedding c'
C : Type u_3
inst✝³ : Category.{v_1, u_3} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasZeroObject C
K : HomologicalComplex C c'
L : HomologicalComplex C c
inst✝ : e.IsRelIff
φ : K.restriction e ⟶ L
i' : ι'
i : ι
hi : e.f i = i'
hi' : ∃ k, e.f k = i'
this : hi'.choose = i
⊢ f φ i' = (K.restrictionXIso e hi).inv ≫ φ.f i ≫ (L.extendXIso e hi).inv

Tactic:
grind [f]

Goal state after:
Module: Mathlib.Algebra.Homology.Embedding.TruncGE

Goal state before:
pp: ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝³ : Category.{v_1, u_3} C
inst✝² : HasZeroMorphisms C
K : HomologicalComplex C c'
e : c.Embedding c'
inst✝¹ : e.IsTruncGE
inst✝ : ∀ (i' : ι'), K.HasHomology i'
i j : ι
hij : c.Rel i j
i' j' : ι'
hi' : e.f i = i'
hj' : e.f j = j'
hi : e.BoundaryGE i
⊢ (if hi : e.BoundaryGE i then
      (truncGE'.XIsoOpcycles K e hi).hom ≫ K.fromOpcycles (e.f i) (e.f j) ≫ (truncGE'.XIso K e ⋯).inv
    else (truncGE'.XIso K e hi).hom ≫ K.d (e.f i) (e.f j) ≫ (truncGE'.XIso K e ⋯).inv) =
    (K.truncGE'XIsoOpcycles e hi' hi).hom ≫ K.fromOpcycles i' j' ≫ (K.truncGE'XIso e hj' ⋯).inv

Tactic:
dif_pos hi

Goal state after:
ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝³ : Category.{v_1, u_3} C
inst✝² : HasZeroMorphisms C
K : HomologicalComplex C c'
e : c.Embedding c'
inst✝¹ : e.IsTruncGE
inst✝ : ∀ (i' : ι'), K.HasHomology i'
i j : ι
hij : c.Rel i j
i' j' : ι'
hi' : e.f i = i'
hj' : e.f j = j'
hi : e.BoundaryGE i
⊢ (truncGE'.XIsoOpcycles K e hi).hom ≫ K.fromOpcycles (e.f i) (e.f j) ≫ (truncGE'.XIso K e ⋯).inv =
    (K.truncGE'XIsoOpcycles e hi' hi).hom ≫ K.fromOpcycles i' j' ≫ (K.truncGE'XIso e hj' ⋯).inv
Module: Mathlib.Algebra.Homology.Embedding.TruncGE

Goal state before:
pp: case pos
ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝⁵ : Category.{v_1, u_3} C
inst✝⁴ : HasZeroMorphisms C
K L M : HomologicalComplex C c'
φ : K ⟶ L
φ' : L ⟶ M
e : c.Embedding c'
inst✝³ : e.IsTruncGE
inst✝² : ∀ (i' : ι'), K.HasHomology i'
inst✝¹ : ∀ (i' : ι'), L.HasHomology i'
inst✝ : ∀ (i' : ι'), M.HasHomology i'
i j : ι
hij : c.Rel i j
hi : e.BoundaryGE i
⊢ (if hi : e.BoundaryGE i then
        (K.truncGE'XIsoOpcycles e ⋯ hi).hom ≫ opcyclesMap φ (e.f i) ≫ (L.truncGE'XIsoOpcycles e ⋯ hi).inv
      else (K.truncGE'XIso e ⋯ hi).hom ≫ φ.f (e.f i) ≫ (L.truncGE'XIso e ⋯ hi).inv) ≫
      (L.truncGE' e).d i j =
    (K.truncGE' e).d i j ≫ (K.truncGE'XIso e ⋯ ⋯).hom ≫ φ.f (e.f j) ≫ (L.truncGE'XIso e ⋯ ⋯).inv

Tactic:
dif_pos hi

Goal state after:
case pos
ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝⁵ : Category.{v_1, u_3} C
inst✝⁴ : HasZeroMorphisms C
K L M : HomologicalComplex C c'
φ : K ⟶ L
φ' : L ⟶ M
e : c.Embedding c'
inst✝³ : e.IsTruncGE
inst✝² : ∀ (i' : ι'), K.HasHomology i'
inst✝¹ : ∀ (i' : ι'), L.HasHomology i'
inst✝ : ∀ (i' : ι'), M.HasHomology i'
i j : ι
hij : c.Rel i j
hi : e.BoundaryGE i
⊢ ((K.truncGE'XIsoOpcycles e ⋯ hi).hom ≫ opcyclesMap φ (e.f i) ≫ (L.truncGE'XIsoOpcycles e ⋯ hi).inv) ≫
      (L.truncGE' e).d i j =
    (K.truncGE' e).d i j ≫ (K.truncGE'XIso e ⋯ ⋯).hom ≫ φ.f (e.f j) ≫ (L.truncGE'XIso e ⋯ ⋯).inv
Module: Mathlib.Algebra.Homology.Embedding.TruncGEHomology

Goal state before:
pp: case pos
ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝³ : Category.{v_1, u_3} C
inst✝² : HasZeroMorphisms C
K : HomologicalComplex C c'
e : c.Embedding c'
inst✝¹ : e.IsTruncGE
inst✝ : ∀ (i' : ι'), K.HasHomology i'
j k : ι
j' : ι'
hj' : e.f j = j'
hj : e.BoundaryGE j
hjk : c.Rel j k
⊢ (K.homologyι j' ≫ (K.truncGE'XIsoOpcycles e hj' hj).inv) ≫ (K.truncGE' e).d j k = 0

pp: case neg
ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝³ : Category.{v_1, u_3} C
inst✝² : HasZeroMorphisms C
K : HomologicalComplex C c'
e : c.Embedding c'
inst✝¹ : e.IsTruncGE
inst✝ : ∀ (i' : ι'), K.HasHomology i'
j k : ι
j' : ι'
hj' : e.f j = j'
hj : e.BoundaryGE j
hjk : ¬c.Rel j k
⊢ (K.homologyι j' ≫ (K.truncGE'XIsoOpcycles e hj' hj).inv) ≫ (K.truncGE' e).d j k = 0

Tactic:
· rw [K.truncGE'_d_eq_fromOpcycles e hjk hj' rfl hj, assoc, Iso.inv_hom_id_assoc,
    homologyι_comp_fromOpcycles_assoc, zero_comp]

Goal state after:
case neg
ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝³ : Category.{v_1, u_3} C
inst✝² : HasZeroMorphisms C
K : HomologicalComplex C c'
e : c.Embedding c'
inst✝¹ : e.IsTruncGE
inst✝ : ∀ (i' : ι'), K.HasHomology i'
j k : ι
j' : ι'
hj' : e.f j = j'
hj : e.BoundaryGE j
hjk : ¬c.Rel j k
⊢ (K.homologyι j' ≫ (K.truncGE'XIsoOpcycles e hj' hj).inv) ≫ (K.truncGE' e).d j k = 0
Module: Mathlib.Algebra.Homology.Embedding.TruncGE

Goal state before:
pp: ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝³ : Category.{v_1, u_3} C
inst✝² : HasZeroMorphisms C
K : HomologicalComplex C c'
e : c.Embedding c'
inst✝¹ : e.IsTruncGE
inst✝ : ∀ (i' : ι'), K.HasHomology i'
i : ι
i' : ι'
hi' : e.f i = i'
hi : e.BoundaryGE i
⊢ (if hi : e.BoundaryGE i then K.pOpcycles (e.f i) ≫ (K.truncGE'XIsoOpcycles e ⋯ hi).inv
    else (K.truncGE'XIso e ⋯ hi).inv) =
    (K.restrictionXIso e hi').hom ≫ K.pOpcycles i' ≫ (K.truncGE'XIsoOpcycles e hi' hi).inv

Tactic:
dif_pos hi

Goal state after:
ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝³ : Category.{v_1, u_3} C
inst✝² : HasZeroMorphisms C
K : HomologicalComplex C c'
e : c.Embedding c'
inst✝¹ : e.IsTruncGE
inst✝ : ∀ (i' : ι'), K.HasHomology i'
i : ι
i' : ι'
hi' : e.f i = i'
hi : e.BoundaryGE i
⊢ K.pOpcycles (e.f i) ≫ (K.truncGE'XIsoOpcycles e ⋯ hi).inv =
    (K.restrictionXIso e hi').hom ≫ K.pOpcycles i' ≫ (K.truncGE'XIsoOpcycles e hi' hi).inv
Module: Mathlib.Algebra.Homology.Embedding.AreComplementary

Goal state before:
pp: ι : Type u_1
ι₁ : Type u_2
ι₂ : Type u_3
c : ComplexShape ι
c₁ : ComplexShape ι₁
c₂ : ComplexShape ι₂
e₁ : c₁.Embedding c
e₂ : c₂.Embedding c
ac : e₁.AreComplementary e₂
i : ι
hi : ∀ (i₂ : ι₂), e₂.f i₂ ≠ i
⊢ ∃ i₁, i = e₁.f i₁

Tactic:
obtain ⟨i₁, rfl⟩ | ⟨i₂, rfl⟩ := ac.union i
  · exact ⟨_, rfl⟩
  · exfalso
    exact hi i₂ rfl

Goal state after:
Module: Mathlib.Algebra.Homology.Embedding.TruncLEHomology

Goal state before:
pp: ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝⁵ : Category.{v_1, u_3} C
inst✝⁴ : HasZeroMorphisms C
K L : HomologicalComplex C c'
φ : K ⟶ L
e : c.Embedding c'
inst✝³ : e.IsTruncLE
inst✝² : ∀ (i' : ι'), K.HasHomology i'
inst✝¹ : ∀ (i' : ι'), L.HasHomology i'
inst✝ : HasZeroObject C
⊢ QuasiIso ((opFunctor C c').map (truncLEMap φ e).op) ↔ ∀ (i : ι) (i' : ι'), e.f i = i' → QuasiIsoAt φ i'

Tactic:
simp only [← quasiIsoAt_opFunctor_map_iff φ]

Goal state after:
ι : Type u_1
ι' : Type u_2
c : ComplexShape ι
c' : ComplexShape ι'
C : Type u_3
inst✝⁵ : Category.{v_1, u_3} C
inst✝⁴ : HasZeroMorphisms C
K L : HomologicalComplex C c'
φ : K ⟶ L
e : c.Embedding c'
inst✝³ : e.IsTruncLE
inst✝² : ∀ (i' : ι'), K.HasHomology i'
inst✝¹ : ∀ (i' : ι'), L.HasHomology i'
inst✝ : HasZeroObject C
⊢ QuasiIso ((opFunctor C c').map (truncLEMap φ e).op) ↔
    ∀ (i : ι) (i' : ι'), e.f i = i' → QuasiIsoAt ((opFunctor C c').map φ.op) i'
Module: Mathlib.Algebra.Homology.SingleHomology

Goal state before:
pp: C : Type u
inst✝³ : Category.{v, u} C
inst✝² : HasZeroMorphisms C
inst✝¹ : HasZeroObject C
ι : Type u_1
inst✝ : DecidableEq ι
c : ComplexShape ι
j : ι
A : C
⊢ ((single C c j).obj A).homologyι j ≫ (singleObjOpcyclesSelfIso c j A).inv = (singleObjHomologySelfIso c j A).hom

Tactic:
rw [← cancel_epi (singleObjHomologySelfIso _ _ _).inv,
    singleObjHomologySelfIso_inv_homologyι_assoc, Iso.hom_inv_id, Iso.inv_hom_id]

Goal state after:
Module: Mathlib.CategoryTheory.Shift.Opposite

Goal state before:
pp: C : Type u_1
D : Type u_2
inst✝⁷ : Category.{v_1, u_1} C
inst✝⁶ : Category.{v_2, u_2} D
A : Type u_3
inst✝⁵ : AddMonoid A
inst✝⁴ : HasShift C A
inst✝³ : HasShift D A
F G : C ⥤ D
inst✝² : F.CommShift A
inst✝¹ : G.CommShift A
τ : F ⟶ G
inst✝ : CommShift τ A
x✝ : A
⊢ (Functor.commShiftIso (OppositeShift.functor A G) x✝).hom ≫
      Functor.whiskerRight (OppositeShift.natTrans A τ) (shiftFunctor (OppositeShift D A) x✝) =
    (shiftFunctor (OppositeShift C A) x✝).whiskerLeft (OppositeShift.natTrans A τ) ≫
      (Functor.commShiftIso (OppositeShift.functor A F) x✝).hom

Tactic:
by
    ext
    rw [← cancel_mono (((OppositeShift.functor A F).commShiftIso _).inv.app _),
      ← cancel_epi (((OppositeShift.functor A G).commShiftIso _).inv.app _)]
    simp only [Functor.comp_obj, comp_app, Functor.whiskerRight_app, assoc,
      Iso.inv_hom_id_app_assoc, Functor.whiskerLeft_app, Iso.hom_inv_id_app, comp_id]
    exact (op_inj_iff _ _).mpr (NatTrans.shift_app_comm τ _ (unop _))

Goal state after:
Module: Mathlib.CategoryTheory.Shift.Pullback

Goal state before:
pp: C : Type u_1
inst✝³ : Category.{v_1, u_1} C
A : Type u_2
B : Type u_3
inst✝² : AddMonoid A
inst✝¹ : AddMonoid B
inst✝ : HasShift C B
φ : A →+ B
X : PullbackShift C φ
⊢ (shiftFunctorZero (PullbackShift C φ) A).hom.app X =
    (pullbackShiftIso C φ 0 (φ 0) ⋯).hom.app X ≫ (shiftFunctorZero' C (φ 0) ⋯).hom.app X

Tactic:
by
  rw [← cancel_epi ((shiftFunctorZero _ A).inv.app X), Iso.inv_hom_id_app,
    pullbackShiftFunctorZero'_inv_app, assoc, Iso.inv_hom_id_app_assoc, Iso.inv_hom_id_app]
  rfl

Goal state after:
Module: Mathlib.CategoryTheory.Triangulated.Opposite.Pretriangulated

Goal state before:
pp: C : Type u_1
inst✝⁵ : Category.{v_1, u_1} C
inst✝⁴ : HasShift C ℤ
inst✝³ : HasZeroObject C
inst✝² : Preadditive C
inst✝¹ : ∀ (n : ℤ), (shiftFunctor C n).Additive
inst✝ : Pretriangulated C
X : Cᵒᵖ
⊢ (𝟙 ((shiftFunctor C (-1)).obj 0)).op = 0

Tactic:
rw [← Functor.map_id, id_zero, Functor.map_zero, op_zero]

Goal state after:
Module: Mathlib.Algebra.Homology.DerivedCategory.Ext.ExactSequences

Goal state before:
pp: C : Type u
inst✝² : Category.{v, u} C
inst✝¹ : Abelian C
inst✝ : HasExt C
X : C
S : ShortComplex C
hS : S.ShortExact
n : ℕ
x : ↑(AddCommGrpCat.of (Ext X S.X₁ n))
⊢ (comp x (mk₀ S.f) ⋯).comp (mk₀ S.g) ⋯ = 0

Tactic:
simp only [comp_assoc_of_third_deg_zero, mk₀_comp_mk₀, ShortComplex.zero, mk₀_zero,
          comp_zero]

Goal state after:
Module: Mathlib.LinearAlgebra.SesquilinearForm.Orthogonal

Goal state before:
pp: K : Type u_7
K₁ : Type u_8
V₁ : Type u_10
V₂ : Type u_11
inst✝⁵ : Field K
inst✝⁴ : Field K₁
inst✝³ : AddCommGroup V₁
inst✝² : Module K₁ V₁
inst✝¹ : AddCommGroup V₂
inst✝ : Module K V₂
J₁ J₁' : K₁ →+* K
B : V₁ →ₛₗ[J₁] V₁ →ₛₗ[J₁'] V₂
x : V₁
hx : (B x) x ≠ 0
μ : V₁ → K₁
h : (B x) (μ x • x) = 0
hμzero : μ x = 0
⊢ μ x • x ∈ ⊥

Tactic:
by rw [hμzero, zero_smul, Submodule.mem_bot]

Goal state after:
Module: Mathlib.LinearAlgebra.Matrix.ToLinearEquiv

Goal state before:
pp: n : Type u_1
inst✝⁴ : Fintype n
R : Type u_2
M : Type u_3
inst✝³ : CommRing R
inst✝² : AddCommGroup M
inst✝¹ : Module R M
b : Basis n R M
inst✝ : DecidableEq n
A : Matrix n n R
hA : IsUnit A.det
x : M
⊢ ((toLin b b) A⁻¹) (((toLin b b) A) x) = x

Tactic:
← LinearMap.comp_apply,

Goal state after:
n : Type u_1
inst✝⁴ : Fintype n
R : Type u_2
M : Type u_3
inst✝³ : CommRing R
inst✝² : AddCommGroup M
inst✝¹ : Module R M
b : Basis n R M
inst✝ : DecidableEq n
A : Matrix n n R
hA : IsUnit A.det
x : M
⊢ ((toLin b b) A⁻¹ ∘ₗ (toLin b b) A) x = x
Module: Mathlib.LinearAlgebra.Matrix.ToLinearEquiv

Goal state before:
pp: n : Type u_1
inst✝⁴ : Fintype n
R : Type u_2
M : Type u_3
inst✝³ : CommRing R
inst✝² : AddCommGroup M
inst✝¹ : Module R M
b : Basis n R M
inst✝ : DecidableEq n
A : Matrix n n R
hA : IsUnit A.det
x : M
⊢ ((toLin b b) A) (((toLin b b) A⁻¹) x) = x

Tactic:
← LinearMap.comp_apply,

Goal state after:
n : Type u_1
inst✝⁴ : Fintype n
R : Type u_2
M : Type u_3
inst✝³ : CommRing R
inst✝² : AddCommGroup M
inst✝¹ : Module R M
b : Basis n R M
inst✝ : DecidableEq n
A : Matrix n n R
hA : IsUnit A.det
x : M
⊢ ((toLin b b) A ∘ₗ (toLin b b) A⁻¹) x = x
Module: Mathlib.LinearAlgebra.Matrix.ToLinearEquiv

Goal state before:
pp: case refine_1
n : Type u_1
inst✝⁴ : Fintype n
inst✝³ : DecidableEq n
S : Type u_2
inst✝² : CommRing S
inst✝¹ : LinearOrder S
inst✝ : IsStrictOrderedRing S
A : Matrix n n S
h1 : Pairwise fun i j ↦ A i j < 0
h2 : ∀ (i : n), 0 < ∑ j, A i j
⊢ Pairwise fun i j ↦ Aᵀ i j < 0

Tactic:
Matrix.transpose_apply

Goal state after:
case refine_1
n : Type u_1
inst✝⁴ : Fintype n
inst✝³ : DecidableEq n
S : Type u_2
inst✝² : CommRing S
inst✝¹ : LinearOrder S
inst✝ : IsStrictOrderedRing S
A : Matrix n n S
h1 : Pairwise fun i j ↦ A i j < 0
h2 : ∀ (i : n), 0 < ∑ j, A i j
⊢ Pairwise fun i j ↦ A j i < 0
Module: Mathlib.LinearAlgebra.Matrix.ToLinearEquiv

Goal state before:
pp: case refine_2
n : Type u_1
inst✝⁴ : Fintype n
inst✝³ : DecidableEq n
S : Type u_2
inst✝² : CommRing S
inst✝¹ : LinearOrder S
inst✝ : IsStrictOrderedRing S
A : Matrix n n S
h1 : Pairwise fun i j ↦ A i j < 0
h2 : ∀ (i : n), 0 < ∑ j, A i j
⊢ ∀ (j : n), 0 < ∑ i, Aᵀ i j

Tactic:
Matrix.transpose_apply

Goal state after:
case refine_2
n : Type u_1
inst✝⁴ : Fintype n
inst✝³ : DecidableEq n
S : Type u_2
inst✝² : CommRing S
inst✝¹ : LinearOrder S
inst✝ : IsStrictOrderedRing S
A : Matrix n n S
h1 : Pairwise fun i j ↦ A i j < 0
h2 : ∀ (i : n), 0 < ∑ j, A i j
⊢ ∀ (j : n), 0 < ∑ i, A j i
Module: Mathlib.LinearAlgebra.CliffordAlgebra.Basic

Goal state before:
pp: R : Type u_1
inst✝² : CommRing R
M : Type u_2
inst✝¹ : AddCommGroup M
inst✝ : Module R M
Q : QuadraticForm R M
a b : M
h : QuadraticMap.IsOrtho Q a b
⊢ (ι Q) a * (ι Q) b + (ι Q) b * (ι Q) a = 0

Tactic:
rw [ι_mul_ι_add_swap, h.polar_eq_zero]
  simp

Goal state after:
Module: Mathlib.LinearAlgebra.Matrix.SpecialLinearGroup

Goal state before:
pp: F : Type u_1
inst✝ : Field F
P : SL(2, F) → Prop
htransvec : ∀ (i j : Fin 2) (h : i ≠ j) (c : F), P (SpecialLinearGroup.transvection h c)
hmul : ∀ (A B : SL(2, F)), P A → P B → P (A * B)
A : SL(2, F)
⊢ P A

Tactic:
by
  refine diagonal_transvection_induction' P _ (fun i j hij c hc ↦ ?_) htransvec hmul
  fin_cases i
  · obtain rfl : j = 1 := by fin_cases j <;> tauto
    change P (diag2 c hc)
    rw [diag2_decompose c hc]
    refine hmul _ _ (hmul _ _ (hmul _ _ (hmul _ _ (hmul _ _ ?_ ?_) ?_) ?_) ?_) ?_
    all_goals exact htransvec _ _ _ _
  · obtain rfl : j = 0 := by fin_cases j <;> tauto
    rw [show diag2n hij c hc = diag2 c⁻¹ (inv_ne_zero hc) by
      ext; simp [diag2n_coe, diagonal_apply]; grind, diag2_decompose c⁻¹ (inv_ne_zero hc)]
    refine hmul _ _ (hmul _ _ (hmul _ _ (hmul _ _ (hmul _ _ ?_ ?_) ?_) ?_) ?_) ?_
    all_goals exact htransvec _ _ _ _

Goal state after:
Module: Mathlib.LinearAlgebra.Matrix.SpecialLinearGroup

Goal state before:
pp: case zero
⊢ 1 = !![1, 0; 0, 1]

Tactic:
Matrix.one_fin_two

Goal state after:
case zero
⊢ !![1, 0; 0, 1] = !![1, 0; 0, 1]