Definitions array 1 Doc

At: array el wf 1

1. T: Type
2. a: [T]Array
3. i: {a.l..a.u}

a[i] T

By:
Unfold `array` 2
THEN
Unfolds [`array_lb`;`array_ub`] 3


Generated subgoal:

12. a: n:m:{n...}{n..m}T
3. i: {1of(a)..1of(2of(a))}
a[i] T