2015-02-06 11:03:36 -08:00
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import data.nat
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open nat
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constant f : nat → nat
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example (x y : nat) (H1 : (λ z, z + 0) x = y) : f x = f y :=
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2015-03-27 17:26:06 -07:00
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by rewrite [▸* at H1, ^[add, nat.rec_on, of_num] at H1, H1]
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2015-02-06 11:03:36 -08:00
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example (x y : nat) (H1 : (λ z, z + 0) x = y) : f x = f y :=
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2015-03-27 17:26:06 -07:00
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by rewrite [▸* at H1, ↑[add, nat.rec_on, of_num] at H1, H1]
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