∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Preadditive C]
  {S₁ S₂ : CategoryTheory.ShortComplex C} {φ : S₁ ⟶ S₂} {h₁ : S₁.RightHomologyData} {h₂ : S₂.RightHomologyData}
  (γ : CategoryTheory.ShortComplex.RightHomologyMapData φ h₁ h₂),
  CategoryTheory.CategoryStruct.comp h₁.p (-γ.φQ) = CategoryTheory.CategoryStruct.comp (-φ).τ₂ h₂.p