| ∀ x0 . ∀ x1 : ι → ι → ι . (∀ x2 . x2 ∈ x0 ⟶ ∀ x3 . x3 ∈ x0 ⟶ x1 x2 x3 ∈ x0) ⟶ ∀ x2 : ι → ι → ι . (∀ x3 . x3 ∈ x0 ⟶ ∀ x4 . x4 ∈ x0 ⟶ x2 x3 x4 ∈ x0) ⟶ ∀ x3 : ι → ι . (∀ x4 . x4 ∈ x0 ⟶ x3 x4 ∈ x0) ⟶ ∀ x4 : ι → ι → ο . struct_b_b_u_r (pack_b_b_u_r x0 x1 x2 x3 x4) |
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