P:Prop. 
P 
P
2. A : Type
3.
(
n:
. A ~ n)
4. k :
5. 0<k
6. f :
(k-1)
A
7. Inj(
(k-1); A; f) [not for witness]
8.
a:A. i:(k-1). f(i) 
a
(k inj
A)P:Prop. P P
(n:. A ~ n)
(k-1)A
(k-1); A; f) [not for witness]
a:A. i:(k-1). f(i) a
(k inj A)| By: |
|
| 1 |
9. i:(k-1). f(i) a
(k inj A) | 8 steps |
About:
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