∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  [inst_2 : CategoryTheory.Limits.HasZeroObject C] {ι : Type u_1} [inst_3 : DecidableEq ι] (c : ComplexShape ι) (j : ι)
  {A B : C} (f : A ⟶ B) {Z : C} (h : B ⟶ Z),
  CategoryTheory.CategoryStruct.comp (HomologicalComplex.homologyMap ((HomologicalComplex.single C c j).map f) j)
      (CategoryTheory.CategoryStruct.comp (HomologicalComplex.singleObjHomologySelfIso c j B).hom h) =
    CategoryTheory.CategoryStruct.comp (HomologicalComplex.singleObjHomologySelfIso c j A).hom
      (CategoryTheory.CategoryStruct.comp f h)