∀ {C : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.Preadditive C]
  {S₁ S₂ : CategoryTheory.ShortComplex C} (φ φ' : S₁ ⟶ S₂) [inst_2 : S₁.HasLeftHomology] [inst_3 : S₂.HasLeftHomology],
  CategoryTheory.ShortComplex.cyclesMap (φ + φ') =
    CategoryTheory.ShortComplex.cyclesMap φ + CategoryTheory.ShortComplex.cyclesMap φ'