e379034b95
- It uses the unifier in "conservative" mode - It only affects the current goal closes #570
12 lines
232 B
Text
12 lines
232 B
Text
import logic
|
|
open tactic
|
|
|
|
constant A : Type.{1}
|
|
constant f : A → A → A
|
|
|
|
theorem tst {a b c : A} (H1 : a = b) (H2 : b = c) : f a b = f b c :=
|
|
begin
|
|
apply (@congr A A (f a) (f b)),
|
|
apply (congr_arg f),
|
|
repeat assumption
|
|
end
|