2015-02-06 19:03:36 +00:00
|
|
|
import data.nat
|
|
|
|
|
open nat
|
|
|
|
|
constant f : nat → nat
|
|
|
|
|
|
|
|
|
|
example (x y : nat) (H1 : (λ z, z + 0) x = y) : f x = f y :=
|
2015-09-16 15:37:43 +00:00
|
|
|
by rewrite [▸* at H1, ^ [add, nat.rec_on, of_num] at H1, H1]
|
2015-02-06 19:03:36 +00:00
|
|
|
|
|
|
|
|
example (x y : nat) (H1 : (λ z, z + 0) x = y) : f x = f y :=
|
2015-03-28 00:26:06 +00:00
|
|
|
by rewrite [▸* at H1, ↑[add, nat.rec_on, of_num] at H1, H1]
|
