At: auto2 lemma 6 1 1 1 1 1 2 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1
1. n: 
2. 0 < n
3. T: Type
4. R: T
Prop
5. f: 
nT
6. Inj(n; T; f)
7. 
t:T. Dec(R(t))
8. b: T
9. 
b = f(n-1)
10. a: n
11. f(n-1) = b
12. a = n-1 
n
a (n-1)
By: SwapEquands 11
Generated subgoals:None
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