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At: fun enumer 1 2 1 2 1

1. n:
2. m:
3. 0 < m
4. f: ((m-1)n)(nm-1)
5. Bij((m-1)n; (nm-1); f)
6. n = 0

0 < (nm-1)

By: Inst Thm* m:, n:. 0 < (mn) [n;m-1]

Generated subgoals:

None


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