∀ {C : Type u_1} [inst : CategoryTheory.Category.{v_1, u_1} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  (S : CategoryTheory.ShortComplex C) [inst_2 : S.HasLeftHomology] {A : C} (f₁ f₂ : A ⟶ S.cycles),
  (f₁ = f₂) = (CategoryTheory.CategoryStruct.comp f₁ S.iCycles = CategoryTheory.CategoryStruct.comp f₂ S.iCycles)