∀ {C : Type u_4} [inst : CategoryTheory.Category.{u_3, u_4} C] [inst_1 : CategoryTheory.Preadditive C] {D : Type u_2}
  [inst_2 : CategoryTheory.Category.{u_1, u_2} D] [inst_3 : CategoryTheory.Preadditive D]
  (F : CategoryTheory.Functor C D) [inst_4 : F.Additive] (n : ℤ) (K : HomologicalComplex C (ComplexShape.up ℤ))
  (i j : ℤ),
  (ComplexShape.up ℤ).Rel i j →
    CategoryTheory.CategoryStruct.comp
        ((fun x =>
              CategoryTheory.Iso.refl
                ((((CategoryTheory.shiftFunctor (HomologicalComplex C (ComplexShape.up ℤ)) n).comp
                          (F.mapHomologicalComplex (ComplexShape.up ℤ))).obj
                      K).X
                  x))
            i).hom
        ((((F.mapHomologicalComplex (ComplexShape.up ℤ)).comp
                  (CategoryTheory.shiftFunctor (HomologicalComplex D (ComplexShape.up ℤ)) n)).obj
              K).d
          i j) =
      CategoryTheory.CategoryStruct.comp
        ((((CategoryTheory.shiftFunctor (HomologicalComplex C (ComplexShape.up ℤ)) n).comp
                  (F.mapHomologicalComplex (ComplexShape.up ℤ))).obj
              K).d
          i j)
        ((fun x =>
              CategoryTheory.Iso.refl
                ((((CategoryTheory.shiftFunctor (HomologicalComplex C (ComplexShape.up ℤ)) n).comp
                          (F.mapHomologicalComplex (ComplexShape.up ℤ))).obj
                      K).X
                  x))
            j).hom