∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  (S : CategoryTheory.ShortComplex C) (hf : S.f = 0) (hg : S.g = 0) (c : CategoryTheory.Limits.CokernelCofork S.f)
  (hc : CategoryTheory.Limits.IsColimit c),
  CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.Cofork.π c)
      (CategoryTheory.ShortComplex.RightHomologyData.ofIsColimitCokernelCofork S hg c hc).g' =
    CategoryTheory.CategoryStruct.comp (CategoryTheory.ShortComplex.RightHomologyData.ofZeros S hf hg).g'
      (CategoryTheory.CategoryStruct.id S).τ₃