∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] {J : Type u} [inst_1 : CategoryTheory.Category.{v, u} J]
  {X : J} (hX : CategoryTheory.Limits.IsInitial X) (F : CategoryTheory.Functor J C)
  [inst_2 : ∀ (i j : J) (f : i ⟶ j), CategoryTheory.IsIso (F.map f)] (x : J),
  (CategoryTheory.Limits.coconeOfDiagramInitial hX F).ι.app x = CategoryTheory.inv (F.map (hX.to x))