∀ {C : Type u_2} [inst : CategoryTheory.Category.{u_1, u_2} C] [inst_1 : CategoryTheory.Preadditive C] {n : ℕ}
  {S : CategoryTheory.ComposableArrows C (n + 3)},
  S.Exact →
    ∀ (k : ℕ) (hk : autoParam (k ≤ n) CategoryTheory.ComposableArrows.Exact.opcyclesIsoCycles._auto_1),
      CategoryTheory.CategoryStruct.comp (S.map' k (k + 1) ⋯ ⋯) (S.map' (k + 1) (k + 2) ⋯ ⋯) = 0