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At: fun enumer 1 2 1 2 2 1 2 1 1 2 1 1 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. f1: n(nm-1)(nm)
8. b: (nm)

b (n(nm-1))

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

Generated subgoal:

19. (nm) = n(nm-1)
b (n(nm-1))


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