Nuprl - Proof: unique fun description 1

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At: unique fun description 1

1. A : Type
2. B : A

Type
3. P : x:A

B(x)

Prop
4.

x:A.

!y:B(x). P(x,y)
5. f : x:A

B(x)
6.

x:A. P(x,f(x))

f is the f:(x:A

B(x)).

x:A. P(x,f(x))

By:	Analyze THEN Rename-2: g

Generated subgoal:

1 7. g : x:AB(x)
8. x:A. P(x,g(x))
g = f
5 steps

About:

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