15 lines
404 B
Text
15 lines
404 B
Text
def f : Nat → Nat := fun x => x - x
|
|
|
|
@[simp] theorem f_zero (n : Nat) : f n = 0 :=
|
|
Nat.sub_self n
|
|
|
|
example (n : Nat) : False := by
|
|
let g := f n
|
|
have : g + n = n := by
|
|
fail_if_success simp (config := { zeta := false }) [Nat.zero_add] -- Should not succeed
|
|
simp [g]
|
|
sorry
|
|
|
|
example (h : a = b) : (fun x => a + x) 0 = b := by
|
|
fail_if_success simp (config := { beta := false })
|
|
simp [*]
|