At: phole aux 2 1 2 1 1
1. n: {2...}
2.
f:(
n

(-1+n)).
i:
n, j:
i. f(i) = f(j)
3. f:
(1+n)

n
4. iii: {1..(1+n)
}
5. (
ii:{iii..(1+n)
}, jj:
ii.
f(ii) = f(jj)) 
(
i:
iii, j:
i. f(i) = f(j))
6.
ii:{(1+iii)..(1+n)
}, jj:
ii.
f(ii) = f(jj)
7. fi:
n
8. fi = f(iii)
9.
x:
iii. fi = f(x)
i:
(1+iii), j:
i. f(i) = f(j)
By:
Analyze -1
THEN
Inst [iii;x] 0
Generated subgoals:None
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