Nuprl - Proof: iter via intseg all units

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
Iterating over only identity values gives the identity value itself.

A:Type, f:(A

A), u:A.

is_ident(A; f; u)

(

a,b:

, e:({a..b

}

A).

((

i:{a..b

}. e(i) = u)

(Iter(f;u) i:{a..b

}. e(i)) = u)

By:	Guarding (a:<type>. <prop>) Auto

Generated subgoal:

1 1. A : Type
2. f : AAA
3. u : A
4. is_ident(A; f; u)
a,b:, e:({a..b}A).
(i:{a..b}. e(i) = u) (Iter(f;u) i:{a..b}. e(i)) = u
6 steps

About:

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html