∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.IsFilteredOrEmpty C] {j₁ j₂ : C}
  (f g h : j₁ ⟶ j₂),
  CategoryTheory.CategoryStruct.comp f (CategoryTheory.IsFiltered.coeq₃Hom f g h) =
    CategoryTheory.CategoryStruct.comp h (CategoryTheory.IsFiltered.coeq₃Hom f g h)