At: auto2 lemma 6 1 1 1 1 1 2 1 1 1 1 1 2 2 1 2 1 1 1 1 1 1 1 1 2 1
1. n: 
2. 0 < n
3. T: Type
4. R: T
Prop
5. f: 
nT
6. Inj(n; T; f)
7. 
R(f(n-1))
8. t: T
9. R(t)
10. a: n
11. f(a) = t
12. a = n-1 
n
t:{t:T| t = f(n-1) }. R(t)
By: Witness t
Generated subgoal:
About:
