{C : Type u_1} →
  [inst : CategoryTheory.Category.{v_1, u_1} C] →
    [inst_1 : CategoryTheory.Preadditive C] →
      (S₁ S₂ : CategoryTheory.ShortComplex C) →
        (h₀ : S₁.X₁ ⟶ S₂.X₁) →
          (h₀_f : CategoryTheory.CategoryStruct.comp h₀ S₂.f = 0) →
            (h₁ : S₁.X₂ ⟶ S₂.X₁) →
              (h₂ : S₁.X₃ ⟶ S₂.X₂) →
                (h₃ : S₁.X₃ ⟶ S₂.X₃) →
                  (g_h₃ : CategoryTheory.CategoryStruct.comp S₁.g h₃ = 0) →
                    CategoryTheory.ShortComplex.Homotopy (S₁.nullHomotopic S₂ h₀ h₀_f h₁ h₂ h₃ g_h₃) 0