8 lines
225 B
Text
8 lines
225 B
Text
set_option pp::implicit true.
|
|
set_option pp::colors false.
|
|
variable N : Type.
|
|
|
|
definition T (a : N) (f : _ -> _) (H : f a == a) : f (f _) == f _ :=
|
|
substp (fun x : N, f (f a) == _) (refl (f (f _))) H.
|
|
|
|
print environment 1.
|