| ∀ x0 . ∀ x1 : ι → ι . ∀ x2 : ι → ι → ι . ∀ x3 . In x3 (lam2 x0 x1 x2) ⟶ ∀ x4 : ο . (∀ x5 . and (In x5 x0) (∀ x6 : ο . (∀ x7 . and (In x7 (x1 x5)) (∀ x8 : ο . (∀ x9 . and (In x9 (x2 x5 x7)) (x3 = setsum x5 (setsum x7 x9)) ⟶ x8) ⟶ x8) ⟶ x6) ⟶ x6) ⟶ x4) ⟶ x4 |
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