∀ {C : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.Preadditive C]
  {S : CategoryTheory.ShortComplex C} [inst_2 : CategoryTheory.Limits.HasZeroObject C] (s : S.Splitting),
  s.leftHomologyData.i = S.f