∀ {C : Type u_1} {D : Type u_2} [inst : CategoryTheory.Category.{v_1, u_1} C]
  [inst_1 : CategoryTheory.Category.{v_2, u_2} D] [inst_2 : CategoryTheory.Limits.HasZeroMorphisms C]
  [inst_3 : CategoryTheory.Limits.HasZeroMorphisms D] (F : CategoryTheory.Functor C D)
  [inst_4 : F.PreservesZeroMorphisms] (S : CategoryTheory.ShortComplex C),
  S.f = 0 →
    ∀ [CategoryTheory.Limits.PreservesLimit (CategoryTheory.Limits.parallelPair S.g 0) F], F.PreservesLeftHomologyOf S