∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.Abelian C]
  (S : CategoryTheory.ShortComplex C),
  (CategoryTheory.ShortComplex.LeftHomologyData.ofAbelian S).π =
    CategoryTheory.Limits.cokernel.π
      (CategoryTheory.Limits.kernel.ι
        (CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.kernel.ι S.g)
          (CategoryTheory.Limits.cokernel.π S.f)))