mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.CategoryTheory.Abelian.DiagramLemmas.Four

Goal state before:
pp: case refine_1.refine_2
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Epi (R₁.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
hR₂' : Epi (R₂.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
h₀ : Epi (app' φ 0 mono_of_epi_of_mono_of_mono'._proof_2)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
ψ : mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0 ⟶ mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0 :=
  homMk₄ (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) 0 0 ⋯ ⋯ ⋯ ⋯
⊢ (mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.Exact

Tactic:
refine exact₂_mk _ (by simp) ?_

Goal state after:
case refine_1.refine_2
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Epi (R₁.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
hR₂' : Epi (R₂.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
h₀ : Epi (app' φ 0 mono_of_epi_of_mono_of_mono'._proof_2)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
ψ : mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0 ⟶ mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0 :=
  homMk₄ (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) 0 0 ⋯ ⋯ ⋯ ⋯
⊢ { X₁ := (mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.obj ⟨0, ⋯⟩,
      X₂ := (mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.obj ⟨1, ⋯⟩,
      X₃ := (mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.obj ⟨2, ⋯⟩,
      f := (mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.map' 0 1 isComplex₂_iff._proof_2 isComplex₂_iff._proof_4,
      g := (mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.map' 1 2 isComplex₂_iff._proof_4 isComplex₂_iff._proof_5,
      zero := ⋯ }.Exact
Module: Mathlib.CategoryTheory.Abelian.DiagramLemmas.Four

Goal state before:
pp: case refine_2.refine_1
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Epi (R₁.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
hR₂' : Epi (R₂.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
h₀ : Epi (app' φ 0 mono_of_epi_of_mono_of_mono'._proof_2)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
ψ : mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0 ⟶ mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0 :=
  homMk₄ (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) 0 0 ⋯ ⋯ ⋯ ⋯
⊢ (mk₂ ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
      ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).Exact

Tactic:
refine exact₂_mk _ (by simp) ?_

Goal state after:
case refine_2.refine_1
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Epi (R₁.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
hR₂' : Epi (R₂.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
h₀ : Epi (app' φ 0 mono_of_epi_of_mono_of_mono'._proof_2)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
ψ : mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0 ⟶ mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0 :=
  homMk₄ (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) 0 0 ⋯ ⋯ ⋯ ⋯
⊢ {
      X₁ :=
        (mk₂ ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨0, ⋯⟩,
      X₂ :=
        (mk₂ ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨1, ⋯⟩,
      X₃ :=
        (mk₂ ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨2, ⋯⟩,
      f :=
        (mk₂ ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).map'
          0 1 isComplex₂_iff._proof_2 isComplex₂_iff._proof_4,
      g :=
        (mk₂ ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).map'
          1 2 isComplex₂_iff._proof_4 isComplex₂_iff._proof_5,
      zero := ⋯ }.Exact
Module: Mathlib.CategoryTheory.Abelian.DiagramLemmas.Four

Goal state before:
pp: case refine_2.refine_2
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Epi (R₁.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
hR₂' : Epi (R₂.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
h₀ : Epi (app' φ 0 mono_of_epi_of_mono_of_mono'._proof_2)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
ψ : mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0 ⟶ mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0 :=
  homMk₄ (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) 0 0 ⋯ ⋯ ⋯ ⋯
⊢ (mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.Exact

Tactic:
refine exact₂_mk _ (by simp) ?_

Goal state after:
case refine_2.refine_2
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Epi (R₁.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
hR₂' : Epi (R₂.map' 1 2 mono_of_epi_of_mono_of_mono'._proof_6 mono_of_epi_of_epi_mono'._proof_1)
h₀ : Epi (app' φ 0 mono_of_epi_of_mono_of_mono'._proof_2)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
ψ : mk₄ (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) 0 0 ⟶ mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0 :=
  homMk₄ (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) 0 0 ⋯ ⋯ ⋯ ⋯
⊢ { X₁ := (mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.obj ⟨0, ⋯⟩,
      X₂ := (mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.obj ⟨1, ⋯⟩,
      X₃ := (mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.obj ⟨2, ⋯⟩,
      f := (mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.map' 0 1 isComplex₂_iff._proof_2 isComplex₂_iff._proof_4,
      g := (mk₄ (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) 0 0).δ₀.δ₀.map' 1 2 isComplex₂_iff._proof_4 isComplex₂_iff._proof_5,
      zero := ⋯ }.Exact
Module: Mathlib.CategoryTheory.Abelian.DiagramLemmas.Four

Goal state before:
pp: case refine_1.refine_2
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Mono (R₁.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
hR₂' : Mono (R₂.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
h₂ : Mono (app' φ 2 mono_of_epi_of_epi_mono'._proof_1)
ψ : mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) ⟶ mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) :=
  homMk₄ 0 0 (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) ⋯ ⋯ ⋯ ⋯
⊢ (mk₂ ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
      ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).Exact

Tactic:
refine exact₂_mk _ (by simp) ?_

Goal state after:
case refine_1.refine_2
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Mono (R₁.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
hR₂' : Mono (R₂.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
h₂ : Mono (app' φ 2 mono_of_epi_of_epi_mono'._proof_1)
ψ : mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) ⟶ mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) :=
  homMk₄ 0 0 (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) ⋯ ⋯ ⋯ ⋯
⊢ {
      X₁ :=
        (mk₂ ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨0, ⋯⟩,
      X₂ :=
        (mk₂ ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨1, ⋯⟩,
      X₃ :=
        (mk₂ ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨2, ⋯⟩,
      f :=
        (mk₂ ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).map'
          0 1 isComplex₂_iff._proof_2 isComplex₂_iff._proof_4,
      g :=
        (mk₂ ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).map'
          1 2 isComplex₂_iff._proof_4 isComplex₂_iff._proof_5,
      zero := ⋯ }.Exact
Module: Mathlib.CategoryTheory.Abelian.DiagramLemmas.Four

Goal state before:
pp: case refine_2.refine_1
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Mono (R₁.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
hR₂' : Mono (R₂.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
h₂ : Mono (app' φ 2 mono_of_epi_of_epi_mono'._proof_1)
ψ : mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) ⟶ mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) :=
  homMk₄ 0 0 (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) ⋯ ⋯ ⋯ ⋯
⊢ (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 0 1 isComplex₂_iff._proof_2 ⋯)
      ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 1 2 isComplex₂_iff._proof_4 ⋯)).Exact

Tactic:
refine exact₂_mk _ (by simp) ?_

Goal state after:
case refine_2.refine_1
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Mono (R₁.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
hR₂' : Mono (R₂.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
h₂ : Mono (app' φ 2 mono_of_epi_of_epi_mono'._proof_1)
ψ : mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) ⟶ mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) :=
  homMk₄ 0 0 (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) ⋯ ⋯ ⋯ ⋯
⊢ {
      X₁ :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨0, ⋯⟩,
      X₂ :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨1, ⋯⟩,
      X₃ :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨2, ⋯⟩,
      f :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 1 2 isComplex₂_iff._proof_4 ⋯)).map'
          0 1 isComplex₂_iff._proof_2 isComplex₂_iff._proof_4,
      g :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).map' 1 2 isComplex₂_iff._proof_4 ⋯)).map'
          1 2 isComplex₂_iff._proof_4 isComplex₂_iff._proof_5,
      zero := ⋯ }.Exact
Module: Mathlib.CategoryTheory.Abelian.DiagramLemmas.Four

Goal state before:
pp: case refine_2.refine_2
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Mono (R₁.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
hR₂' : Mono (R₂.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
h₂ : Mono (app' φ 2 mono_of_epi_of_epi_mono'._proof_1)
ψ : mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) ⟶ mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) :=
  homMk₄ 0 0 (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) ⋯ ⋯ ⋯ ⋯
⊢ (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
      ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).Exact

Tactic:
refine exact₂_mk _ (by simp) ?_

Goal state after:
case refine_2.refine_2
C : Type u_1
inst✝¹ : Category.{v_1, u_1} C
inst✝ : Abelian C
R₁ R₂ : ComposableArrows C 2
φ : R₁ ⟶ R₂
hR₁ : R₁.Exact
hR₂ : R₂.Exact
hR₁' : Mono (R₁.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
hR₂' : Mono (R₂.map' 0 1 mono_of_epi_of_mono_of_mono'._proof_9 mono_of_epi_of_mono_of_mono'._proof_6)
h₁ : IsIso (app' φ 1 mono_of_epi_of_mono_of_mono'._proof_6)
h₂ : Mono (app' φ 2 mono_of_epi_of_epi_mono'._proof_1)
ψ : mk₄ 0 0 (R₁.map' 0 1 ⋯ ⋯) (R₁.map' 1 2 ⋯ ⋯) ⟶ mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯) :=
  homMk₄ 0 0 (app' φ 0 ⋯) (app' φ 1 ⋯) (app' φ 2 ⋯) ⋯ ⋯ ⋯ ⋯
⊢ {
      X₁ :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨0, ⋯⟩,
      X₂ :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨1, ⋯⟩,
      X₃ :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).obj
          ⟨2, ⋯⟩,
      f :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).map'
          0 1 isComplex₂_iff._proof_2 isComplex₂_iff._proof_4,
      g :=
        (mk₂ ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 0 1 isComplex₂_iff._proof_2 ⋯)
              ((mk₄ 0 0 (R₂.map' 0 1 ⋯ ⋯) (R₂.map' 1 2 ⋯ ⋯)).δ₀.map' 1 2 isComplex₂_iff._proof_4 ⋯)).map'
          1 2 isComplex₂_iff._proof_4 isComplex₂_iff._proof_5,
      zero := ⋯ }.Exact
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
⊢ contractibleTriangle X ∈ distinguishedTriangles C

Tactic:
by
  rw [mem_distinguishedTriangles_iff']
  exact ⟨_, inv_rot_of_distTriang _ (Pretriangulated.contractible_distinguished X.unop),
    ⟨contractibleTriangleIso X⟩⟩

Goal state after:
Module: Mathlib.Algebra.Category.ModuleCat.Ext.Finite

Goal state before:
pp: case succ
R : Type u
inst✝⁴ : CommRing R
inst✝³ : Small.{v, u} R
inst✝² : IsNoetherianRing R
M : ModuleCat R
inst✝¹ : Module.Finite R ↑M
n : ℕ
ih : ∀ (N : ModuleCat R) [Module.Finite R ↑N], Module.Finite R (Ext N M n)
N✝ : ModuleCat R
inst✝ : Module.Finite R ↑N✝
N : Type v
w✝³ : AddCommGroup N
w✝² : Module R N
w✝¹ : Module.Free R N
w✝ : Module.Finite R N
f : N →ₗ[R] ↑N✝
surjf : Function.Surjective ⇑f
⊢ Module.Finite R (Ext N✝ M (n + 1))

Tactic:
let exac := LinearMap.shortExact_shortComplexKer surjf

Goal state after:
case succ
R : Type u
inst✝⁴ : CommRing R
inst✝³ : Small.{v, u} R
inst✝² : IsNoetherianRing R
M : ModuleCat R
inst✝¹ : Module.Finite R ↑M
n : ℕ
ih : ∀ (N : ModuleCat R) [Module.Finite R ↑N], Module.Finite R (Ext N M n)
N✝ : ModuleCat R
inst✝ : Module.Finite R ↑N✝
N : Type v
w✝³ : AddCommGroup N
w✝² : Module R N
w✝¹ : Module.Free R N
w✝ : Module.Finite R N
f : N →ₗ[R] ↑N✝
surjf : Function.Surjective ⇑f
exac : f.shortComplexKer.ShortExact := LinearMap.shortExact_shortComplexKer surjf
⊢ Module.Finite R (Ext N✝ M (n + 1))
Module: Mathlib.LinearAlgebra.Matrix.Nondegenerate

Goal state before:
pp: case refine_2
m : Type u_1
n : Type u_2
R : Type u_3
inst✝² : CommSemiring R
M : Matrix m n R
inst✝¹ : Finite m
inst✝ : Fintype n
this : Fintype m
h : ∀ (v : n → R), M *ᵥ v = 0 → v = 0
w : n → R
hw : ∀ (v : m → R), v ⬝ᵥ M *ᵥ w = 0
i : m
⊢ (M *ᵥ w) i = 0 i

Tactic:
simpa using hw <| Pi.single i 1

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

Goal state before:
pp: ι : Type u_1
κ : Type u_2
R : Type u_3
M : Type u_4
inst✝⁴ : Fintype ι
inst✝³ : Finite κ
inst✝² : CommRing R
inst✝¹ : AddCommGroup M
inst✝ : Module R M
v : ι → M
A : Matrix κ ι R
hA : A.Nondegenerate
this : Fintype κ
w : κ → R
hw : ∑ x, (∑ i, w i • A i x) • v x = 0
hv : w ᵥ* A = 0
⊢ w = 0

Tactic:
replace hv (w' : ι → R) : w ⬝ᵥ A *ᵥ w' = 0 := by
    simpa [Matrix.dotProduct_mulVec] using congr_arg (fun x ↦ dotProduct x w') hv

Goal state after:
ι : Type u_1
κ : Type u_2
R : Type u_3
M : Type u_4
inst✝⁴ : Fintype ι
inst✝³ : Finite κ
inst✝² : CommRing R
inst✝¹ : AddCommGroup M
inst✝ : Module R M
v : ι → M
A : Matrix κ ι R
hA : A.Nondegenerate
this : Fintype κ
w : κ → R
hw : ∑ x, (∑ i, w i • A i x) • v x = 0
hv : ∀ (w' : ι → R), w ⬝ᵥ A *ᵥ w' = 0
⊢ w = 0
Module: Mathlib.LinearAlgebra.Matrix.Basis

Goal state before:
pp: ι : Type u_1
R : Type u_5
inst✝¹ : CommSemiring R
inst✝ : Fintype ι
b : Basis ι R (ι → R)
A : Matrix ι ι R
⊢ b.toMatrix ⇑(Pi.basisFun R ι) * A = of fun i j ↦ (b.repr (A.col j)) i

Tactic:
simp only [basis_toMatrix_mul _ _ (Pi.basisFun R ι), Matrix.toLin_eq_toLin']
  ext i j
  rw [LinearMap.toMatrix_apply, Matrix.toLin'_apply, Pi.basisFun_apply,
    Matrix.mulVec_single_one, Matrix.of_apply]

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 * A)) x = x

Tactic:
Matrix.nonsing_inv_mul _ hA,

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) 1) x = x
Module: Mathlib.RingTheory.RootsOfUnity.Basic

Goal state before:
pp: R : Type u_4
F : Type u_6
k : ℕ
inst✝⁴ : NeZero k
inst✝³ : CommRing R
inst✝² : IsDomain R
inst✝¹ : FunLike F R R
inst✝ : MonoidHomClass F R R
σ : F
ζ : ↥(rootsOfUnity k R)
⊢ ∃ m, σ ↑↑ζ = ↑↑ζ ^ m

Tactic:
obtain ⟨m, hm⟩ := MonoidHom.map_cyclic (restrictRootsOfUnity σ k)
  rw [← restrictRootsOfUnity_coe_apply, hm, ← zpow_mod_orderOf, ← Int.toNat_of_nonneg
      (m.emod_nonneg (Int.natCast_ne_zero.mpr (pos_iff_ne_zero.mp (orderOf_pos ζ)))),
    zpow_natCast, rootsOfUnity.coe_pow]
  exact ⟨(m % orderOf ζ).toNat, rfl⟩

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

Goal state before:
pp: n : Type u
inst✝³ : DecidableEq n
inst✝² : Fintype n
R : Type v
inst✝¹ : CommRing R
inst✝ : Subsingleton n
x : SpecialLinearGroup n R
x✝ : x ∈ center (SpecialLinearGroup n R)
⊢ x ∈ ⊥

Tactic:
rw [mem_bot, Subsingleton.elim x 1]

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

Goal state before:
pp: n : Type u
inst✝³ : DecidableEq n
inst✝² : Fintype n
R : Type v
inst✝¹ : CommRing R
inst✝ : CharZero R
g h : SpecialLinearGroup n ℤ
⊢ (map (Int.castRingHom R)) g = (map (Int.castRingHom R)) h → g = h

Tactic:
simp_rw [ext_iff, map_apply_coe, RingHom.mapMatrix_apply, Int.coe_castRingHom,
    Matrix.map_apply, Int.cast_inj]

Goal state after:
n : Type u
inst✝³ : DecidableEq n
inst✝² : Fintype n
R : Type v
inst✝¹ : CommRing R
inst✝ : CharZero R
g h : SpecialLinearGroup n ℤ
⊢ (∀ (i j : n), ↑g i j = ↑h i j) → ∀ (i j : n), ↑g i j = ↑h i j
Module: Mathlib.LinearAlgebra.CliffordAlgebra.Basic

Goal state before:
pp: R : Type u_1
inst✝² : CommRing R
M₁ : Type u_4
inst✝¹ : AddCommGroup M₁
inst✝ : Module R M₁
Q₁ : QuadraticForm R M₁
⊢ map (QuadraticMap.Isometry.id Q₁) = AlgHom.id R (CliffordAlgebra Q₁)

Tactic:
ext m

Goal state after:
R : Type u_1
inst✝² : CommRing R
M₁ : Type u_4
inst✝¹ : AddCommGroup M₁
inst✝ : Module R M₁
Q₁ : QuadraticForm R M₁
m : M₁
⊢ ((map (QuadraticMap.Isometry.id Q₁)).toLinearMap ∘ₗ ι Q₁) m =
    ((AlgHom.id R (CliffordAlgebra Q₁)).toLinearMap ∘ₗ ι Q₁) m
Module: Mathlib.LinearAlgebra.CliffordAlgebra.Basic

Goal state before:
pp: R : Type u_1
inst✝⁶ : CommRing R
M₁ : Type u_4
M₂ : Type u_5
M₃ : Type u_6
inst✝⁵ : AddCommGroup M₁
inst✝⁴ : AddCommGroup M₂
inst✝³ : AddCommGroup M₃
inst✝² : Module R M₁
inst✝¹ : Module R M₂
inst✝ : Module R M₃
Q₁ : QuadraticForm R M₁
Q₂ : QuadraticForm R M₂
Q₃ : QuadraticForm R M₃
f : Q₂ →qᵢ Q₃
g : Q₁ →qᵢ Q₂
⊢ (map f).comp (map g) = map (f.comp g)

Tactic:
ext m

Goal state after:
R : Type u_1
inst✝⁶ : CommRing R
M₁ : Type u_4
M₂ : Type u_5
M₃ : Type u_6
inst✝⁵ : AddCommGroup M₁
inst✝⁴ : AddCommGroup M₂
inst✝³ : AddCommGroup M₃
inst✝² : Module R M₁
inst✝¹ : Module R M₂
inst✝ : Module R M₃
Q₁ : QuadraticForm R M₁
Q₂ : QuadraticForm R M₂
Q₃ : QuadraticForm R M₃
f : Q₂ →qᵢ Q₃
g : Q₁ →qᵢ Q₂
m : M₁
⊢ (((map f).comp (map g)).toLinearMap ∘ₗ ι Q₁) m = ((map (f.comp g)).toLinearMap ∘ₗ ι Q₁) m
Module: Mathlib.LinearAlgebra.CliffordAlgebra.Basic

Goal state before:
pp: R : Type u_1
inst✝¹⁰ : CommRing R
M : Type u_2
inst✝⁹ : AddCommGroup M
inst✝⁸ : Module R M
Q : QuadraticForm R M
A : Type u_3
inst✝⁷ : Semiring A
inst✝⁶ : Algebra R A
M₁ : Type u_4
M₂ : Type u_5
M₃ : Type u_6
inst✝⁵ : AddCommGroup M₁
inst✝⁴ : AddCommGroup M₂
inst✝³ : AddCommGroup M₃
inst✝² : Module R M₁
inst✝¹ : Module R M₂
inst✝ : Module R M₃
Q₁ : QuadraticForm R M₁
Q₂ : QuadraticForm R M₂
Q₃ : QuadraticForm R M₃
e : QuadraticMap.IsometryEquiv Q₁ Q₂
⊢ e.toIsometry.comp e.symm.toIsometry = QuadraticMap.Isometry.id Q₂

Tactic:
ext m

Goal state after:
R : Type u_1
inst✝¹⁰ : CommRing R
M : Type u_2
inst✝⁹ : AddCommGroup M
inst✝⁸ : Module R M
Q : QuadraticForm R M
A : Type u_3
inst✝⁷ : Semiring A
inst✝⁶ : Algebra R A
M₁ : Type u_4
M₂ : Type u_5
M₃ : Type u_6
inst✝⁵ : AddCommGroup M₁
inst✝⁴ : AddCommGroup M₂
inst✝³ : AddCommGroup M₃
inst✝² : Module R M₁
inst✝¹ : Module R M₂
inst✝ : Module R M₃
Q₁ : QuadraticForm R M₁
Q₂ : QuadraticForm R M₂
Q₃ : QuadraticForm R M₃
e : QuadraticMap.IsometryEquiv Q₁ Q₂
m : M₂
⊢ (e.toIsometry.comp e.symm.toIsometry) m = (QuadraticMap.Isometry.id Q₂) m