4575799f8e
This PR cleans up the style of the library in anticipation of a future PR that requires strict indentation for tactic sequences.
14 lines
362 B
Text
14 lines
362 B
Text
theorem n_minus_one_le_n {n : Nat} : n > 0 → n - 1 < n := by
|
|
cases n with
|
|
| zero => simp []
|
|
| succ n =>
|
|
intros
|
|
rw [Nat.add_sub_cancel]
|
|
apply Nat.le.refl
|
|
|
|
partial def foo : Array Int → Int
|
|
| arr => Id.run do
|
|
let mut r : Int := 1
|
|
while h : arr.size > 0 do
|
|
r := r * arr[arr.size - 1]'(by apply n_minus_one_le_n h)
|
|
return r
|