∀ {α : Type u_2} {β : Type u_3} [inst : OmegaCompletePartialOrder α] [inst_1 : OmegaCompletePartialOrder β]
  (c₀ : OmegaCompletePartialOrder.Chain (α →𝒄 β)) (c₁ : OmegaCompletePartialOrder.Chain α) (z : β),
  (∀ (j i : ℕ), (c₀ i) (c₁ j) ≤ z) ↔ ∀ (i : ℕ), (c₀ i) (c₁ i) ≤ z