At: auto2 lemma 5 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1
1. Alph: Type
2. n: 
3. n1: 
4. f:
n1
Alph
5. Bij(
n1; Alph; f)
6.
f:((
n

n1)

(n1
n)). Bij(
n

n1;
(n1
n); f)
7. f1: (
n

n1)

(n1
n)
8. g:
(n1
n)

n

n1
9. g o f1 = Id
10. f1 o g = Id
11. b: Alph*
12. ||b|| = n
13. g1: Alph

n1
14. InvFuns(
n1; Alph; f; g1)
(
x.x)(g1 o (
z:
||b||. b[z])) = g1 o (
z:
||b||. b[z])
n

n1
By: Reduce 0
Generated subgoals:None
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