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At: one one preser fin 1 1 1 1 1 1 1 1 1 1 1 1 1
1. T: Type
2. S: Type
3. n:
4. f: nT
5. Bij(n; T; f)
6. f1: TS
7. g: ST
8. g o f1 = Id
9. f1 o g = Id
10. a1: n
11. a2: n
12. (f1 o f)(a1) = (f1 o f)(a2)
13. f(a1) = f(a2)

a1 = a2
By: Analyze 5
Generated subgoal:

15. Inj(n; T; f)
6. Surj(n; T; f)
7. f1: TS
8. g: ST
9. g o f1 = Id
10. f1 o g = Id
11. a1: n
12. a2: n
13. (f1 o f)(a1) = (f1 o f)(a2)
14. f(a1) = f(a2)
a1 = a2

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