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At: quotient of nsubn 2 1 2 1
1. n: {1+1...}
2. E:((n-1)(n-1)Prop). (EquivRel x,y:(n-1). x E y) & (x,y:(n-1). Dec(x E y)) (m:(n-1+1). m ~ (i,j:(n-1)//(i E j)))
3. E: nnProp
4. EquivRel x,y:n. x E y
5. x,y:n. Dec(x E y)
6. EquivRel x,y:(n-1). x E y
7. m: (n-1+1)
8. m ~ (i,j:(n-1)//(i E j))

m:(n+1). m ~ (i,j:n//(i E j))
By:
Unfold `one_one_corr` 8
THEN
ExRepD
Generated subgoal:

18. f: m(i,j:(n-1)//(i E j))
9. g: (i,j:(n-1)//(i E j))m
10. InvFuns(m; i,j:(n-1)//(i E j); f; g)
m:(n+1). m ~ (i,j:n//(i E j))

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