6 lines
290 B
Text
6 lines
290 B
Text
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definition Sum_weird [forward] : ∀ (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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(multi-)patterns:
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?M_1 : ℕ → ℕ, ?M_2 : ℕ → ℕ, ?M_3 : ℕ → ℕ, ?M_4 : ℕ
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{Sum ?M_4 (λ (x : ℕ), ?M_1 (?M_2 (?M_3 x)))}
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