2014-08-25 02:58:48 +00:00
|
|
|
import logic
|
2014-09-03 23:00:38 +00:00
|
|
|
open tactic
|
2014-07-03 17:50:08 +00:00
|
|
|
|
|
|
|
|
theorem tst {A : Type} {f : A → A → A} {a b c : A} (H1 : a = b) (H2 : b = c) : f a b = f b c
|
|
|
|
|
:= by apply congr;
|
2014-09-05 01:41:06 +00:00
|
|
|
apply (eq.subst H2);
|
2014-09-04 23:36:06 +00:00
|
|
|
apply eq.refl;
|
2014-07-03 17:50:08 +00:00
|
|
|
assumption
|
