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At: fun enumer 1 2 1 1 1 2 1 1 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
7. b:
8. 0 b < (nm)

a:(mn). (z.z(0))(a) = b (nm)

By: Assert ((nm) = 0)

Generated subgoals:

1 (nm) = 0
29. (nm) = 0
a:(mn). (z.z(0))(a) = b (nm)


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