∀ {C : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  {S₁ S₂ : CategoryTheory.ShortComplex C} (φ : S₁ ⟶ S₂) [S₂.HasLeftHomology] [CategoryTheory.Epi φ.τ₁]
  [CategoryTheory.IsIso φ.τ₂] [CategoryTheory.Mono φ.τ₃], S₁.HasLeftHomology