At: fun enumer 1 2 1 2 2 1 2 1 1 1 1 1 1 1
1. n: 
2. m: 
3. 0 < m
4. f: (
(m-1)

n)

(n
m-1)
5. Bij(
(m-1)

n;
(n
m-1); f)
6.
n = 0
7. f1:
n
(n
m-1)

(n
m)
8.
a1,a2:(
n
(n
m-1)). f1(a1) = f1(a2)
(n
(n
m-1)) 
a1 = a2
9. a1:
m

n
10. a2:
m

n
11. f1( < a1(m-1),f(a1) > ) = f1( < a2(m-1),f(a2) > )
f1( < a1(m-1),f(a1) > ) = f1( < a2(m-1),f(a2) > )
(n
(n
m-1))
By: RWH
(LemmaC
Thm*
n,k:
. 0 < k 
(n
k) = n
(n
k-1))
11
Generated subgoals:None
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