Module: Mathlib.CategoryTheory.Monoidal.Braided.Reflection

Goal state before:
pp: C : Type u_1
D : Type u_2
inst✝⁶ : Category.{v_1, u_1} C
inst✝⁵ : Category.{v_2, u_2} D
inst✝⁴ : MonoidalCategory D
inst✝³ : SymmetricCategory D
inst✝² : MonoidalClosed D
R : C ⥤ D
inst✝¹ : R.Faithful
inst✝ : R.Full
L : D ⥤ C
adj : L ⊣ R
tfae_3_to_4 :
  (∀ (d d' : D), IsIso (L.map (adj.unit.app d ▷ d'))) → ∀ (d d' : D), IsIso (L.map (adj.unit.app d ⊗ₘ adj.unit.app d'))
tfae_4_to_1 :
  (∀ (d d' : D), IsIso (L.map (adj.unit.app d ⊗ₘ adj.unit.app d'))) →
    ∀ (c : C) (d : D), IsIso (adj.unit.app ((ihom d).obj (R.obj c)))
h : ∀ (c : C) (d : D), IsIso (adj.unit.app ((ihom d).obj (R.obj c)))
d d' : D
c : C
w₁ :
  ⇑(ConcreteCategory.hom ((coyoneda.map (L.map (adj.unit.app d ▷ d')).op).app c)) =
    ⇑(adj.homEquiv (Opposite.unop (Opposite.op ((𝟭 D).obj d ⊗ d'))) c).symm ∘
      ⇑(ConcreteCategory.hom ((coyoneda.map (adj.unit.app d ▷ d').op).app (R.obj c))) ∘
        ⇑(adj.homEquiv (Opposite.unop (Opposite.op ((L ⋙ R).obj d ⊗ d'))) c)
w₂ :
  (coyoneda.map (adj.unit.app d ▷ d').op).app (R.obj c) =
    ((yoneda.obj (R.obj c)).mapIso (β_ (Opposite.op ((L ⋙ R).1 d)) (Opposite.op d'))).hom ≫
      (coyoneda.map (d' ◁ adj.unit.app d).op).app (R.obj c) ≫
        ((yoneda.obj (R.obj c)).mapIso (β_ (Opposite.op d') (Opposite.op ((𝟭 D).1 d)))).hom
w₃ :
  ⇑(ConcreteCategory.hom ((coyoneda.map (d' ◁ adj.unit.app d).op).app (R.obj c))) =
    ⇑((ihom.adjunction d').homEquiv (Opposite.unop (Opposite.op ((𝟭 D).obj d))) (R.obj c)).symm ∘
      ⇑(ConcreteCategory.hom ((coyoneda.map (adj.unit.app d).op).app ((ihom d').obj (R.obj c)))) ∘
        ⇑((ihom.adjunction d').homEquiv (Opposite.unop (Opposite.op ((L ⋙ R).obj d))) (R.obj c))
w₄ :
  (coyoneda.map (adj.unit.app d).op).app ((ihom d').obj (R.obj c)) ≫
      (coyoneda.obj (Opposite.op d)).map (adj.unit.app ((ihom d').obj (R.obj c))) =
    (coyoneda.obj (Opposite.op ((L ⋙ R).obj d))).map (adj.unit.app ((ihom d').obj (R.obj c))) ≫
      (coyoneda.map (adj.unit.app d).op).app ((L ⋙ R).obj ((ihom d').obj (R.obj c)))
f : (coyoneda.obj (Opposite.op ((L ⋙ R).obj d))).obj ((L ⋙ R).obj ((ihom d').obj (R.obj c)))
⊢ R.map (L.map (adj.unit.app d)) ≫ R.map (L.map f) ≫ R.map (adj.counit.app (L.obj ((ihom d').obj (R.obj c)))) = f

Tactic:
have : f = R.map (R.preimage f) := by simp

Goal state after:
C : Type u_1
D : Type u_2
inst✝⁶ : Category.{v_1, u_1} C
inst✝⁵ : Category.{v_2, u_2} D
inst✝⁴ : MonoidalCategory D
inst✝³ : SymmetricCategory D
inst✝² : MonoidalClosed D
R : C ⥤ D
inst✝¹ : R.Faithful
inst✝ : R.Full
L : D ⥤ C
adj : L ⊣ R
tfae_3_to_4 :
  (∀ (d d' : D), IsIso (L.map (adj.unit.app d ▷ d'))) → ∀ (d d' : D), IsIso (L.map (adj.unit.app d ⊗ₘ adj.unit.app d'))
tfae_4_to_1 :
  (∀ (d d' : D), IsIso (L.map (adj.unit.app d ⊗ₘ adj.unit.app d'))) →
    ∀ (c : C) (d : D), IsIso (adj.unit.app ((ihom d).obj (R.obj c)))
h : ∀ (c : C) (d : D), IsIso (adj.unit.app ((ihom d).obj (R.obj c)))
d d' : D
c : C
w₁ :
  ⇑(ConcreteCategory.hom ((coyoneda.map (L.map (adj.unit.app d ▷ d')).op).app c)) =
    ⇑(adj.homEquiv (Opposite.unop (Opposite.op ((𝟭 D).obj d ⊗ d'))) c).symm ∘
      ⇑(ConcreteCategory.hom ((coyoneda.map (adj.unit.app d ▷ d').op).app (R.obj c))) ∘
        ⇑(adj.homEquiv (Opposite.unop (Opposite.op ((L ⋙ R).obj d ⊗ d'))) c)
w₂ :
  (coyoneda.map (adj.unit.app d ▷ d').op).app (R.obj c) =
    ((yoneda.obj (R.obj c)).mapIso (β_ (Opposite.op ((L ⋙ R).1 d)) (Opposite.op d'))).hom ≫
      (coyoneda.map (d' ◁ adj.unit.app d).op).app (R.obj c) ≫
        ((yoneda.obj (R.obj c)).mapIso (β_ (Opposite.op d') (Opposite.op ((𝟭 D).1 d)))).hom
w₃ :
  ⇑(ConcreteCategory.hom ((coyoneda.map (d' ◁ adj.unit.app d).op).app (R.obj c))) =
    ⇑((ihom.adjunction d').homEquiv (Opposite.unop (Opposite.op ((𝟭 D).obj d))) (R.obj c)).symm ∘
      ⇑(ConcreteCategory.hom ((coyoneda.map (adj.unit.app d).op).app ((ihom d').obj (R.obj c)))) ∘
        ⇑((ihom.adjunction d').homEquiv (Opposite.unop (Opposite.op ((L ⋙ R).obj d))) (R.obj c))
w₄ :
  (coyoneda.map (adj.unit.app d).op).app ((ihom d').obj (R.obj c)) ≫
      (coyoneda.obj (Opposite.op d)).map (adj.unit.app ((ihom d').obj (R.obj c))) =
    (coyoneda.obj (Opposite.op ((L ⋙ R).obj d))).map (adj.unit.app ((ihom d').obj (R.obj c))) ≫
      (coyoneda.map (adj.unit.app d).op).app ((L ⋙ R).obj ((ihom d').obj (R.obj c)))
f : (coyoneda.obj (Opposite.op ((L ⋙ R).obj d))).obj ((L ⋙ R).obj ((ihom d').obj (R.obj c)))
this : f = R.map (R.preimage f)
⊢ R.map (L.map (adj.unit.app d)) ≫ R.map (L.map f) ≫ R.map (adj.counit.app (L.obj ((ihom d').obj (R.obj c)))) = f