| ∀ x0 : ι → (ι → ο) → (ι → ο) → ι → ο . ∀ x1 . ∀ x2 x3 : ι → ο . ∀ x4 . (∀ x5 : ι → ο . (∀ x6 . x6 ∈ x1 ⟶ iff (x2 x6) (x5 x6)) ⟶ ∀ x6 : ι → ο . (∀ x7 . x7 ∈ x1 ⟶ iff (x3 x7) (x6 x7)) ⟶ x0 x1 x5 x6 x4 = x0 x1 x2 x3 x4) ⟶ unpack_p_p_e_o (pack_p_p_e x1 x2 x3 x4) x0 = x0 x1 x2 x3 x4 |
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