Nuprl - Proof: compose iter inj cycles 1 1 2

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At: compose iter inj cycles 1 1 2

1. k :

2. f :

k
3. Inj(

k; f)
4. u :

k
5.

i,j:

. i<j & f{

j}(u) = f{

i}(u)

. f{

i}(u) = u

By:	ExistHD Hyp:-1

Generated subgoal:

1 5. i :
6. j :
7. i<j
8. f{j}(u) = f{i}(u)
i:. f{i}(u) = u
3 steps

About:

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