Nuprl - Proof: iter via intseg singleton 1 1 1 1

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At: iter via intseg singleton 1 1 1 1

1. A : Type
2. f : A

A
3. u : A
4. is_ident(A; f; u)
5. a :

6. b :

7. e : {a..b

}

A
8. a+1 = b
9. a<b
10. b-1

f(u,e(a)) = e(a)

By:	BackThru: is_ident(A; f; u)

Generated subgoals:

None

About:

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