Nuprl - Proof: compose iter surjection 1 2

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At: compose iter surjection 1 2

1. A : Type
2. f : A

A
3. Surj(A; A; f)
4. i :

5. 0<i
6. Surj(A; A; f{

i-1})

Surj(A; A; f{

i})

By:	SimilarTo Hyp:-1

Generated subgoal:

1 6. b : A
7. a:A. f{i-1}(a) = b
a:A. f{i}(a) = b
6 steps

About:

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