15 lines
341 B
Text
15 lines
341 B
Text
import data.nat
|
|
open nat
|
|
constant f : nat → nat
|
|
constant g : nat → nat
|
|
|
|
definition lemma1 [forward] : ∀ x, (:g (f x):) = x :=
|
|
sorry
|
|
|
|
set_option blast.init_depth 10
|
|
set_option blast.inc_depth 1000
|
|
set_option blast.subst false
|
|
set_option blast.ematch true
|
|
|
|
example (a b c : nat) : a = f b → a = f c → g a ≠ b → false :=
|
|
by blast
|