λ x0 . λ x1 : ι → ι → ι . and (∀ x2 . x2 ∈ x0 ⟶ ∀ x3 . x3 ∈ x0 ⟶ ∀ x4 . x4 ∈ x0 ⟶ x1 (x1 x2 x3) x4 = x1 x2 (x1 x3 x4)) (∀ x2 : ο . (∀ x3 . and (x3 ∈ x0) (∀ x4 . x4 ∈ x0 ⟶ and (x1 x4 x3 = x4) (x1 x3 x4 = x4)) ⟶ x2) ⟶ x2) |
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