3 lines
163 B
Text
3 lines
163 B
Text
attribute [forward]
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definition Sum_weird : ∀ (f g h : ℕ → ℕ) (n : ℕ), Sum n (λ (x : ℕ), f (g (h x))) = 1 :=
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λ (f g h : ℕ → ℕ) (n : ℕ), sorry
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