{C : Type u_1} →
  [inst : CategoryTheory.Category.{v_1, u_1} C] →
    [inst_1 : CategoryTheory.Abelian C] →
      {A B : Cᵒᵖ} → (g : A ⟶ B) → Opposite.op (CategoryTheory.Limits.kernel g.unop) ≅ CategoryTheory.Limits.cokernel g