∀ {C : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.Preadditive C]
  {S₁ S₂ : CategoryTheory.ShortComplex C} {φ : S₁ ⟶ S₂} (h₁ : S₁.RightHomologyData) (h₂ : S₂.RightHomologyData),
  CategoryTheory.ShortComplex.opcyclesMap' (-φ) h₁ h₂ = -CategoryTheory.ShortComplex.opcyclesMap' φ h₁ h₂