Nuprl - Proof: fun description 1

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At: fun description 1

1. A : Type
2. B : A

Type
3. P : x:A

B(x)

Prop
4.

x:A.

y:B(x). y is the y:B(x). P(x,y)

f:(x:A

B(x)).

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

By:	FwdThru: Thm* (x:A. y:B(x). Q(x,y)) (f:(x:AB(x)). x:A. Q(x,f(x))) onHyps [4]

Generated subgoal:

1 5. f:(x:AB(x)). x:A. f(x) is the y:B(x). P(x,y)
f:(x:AB(x)). x:A. P(x,f(x))
2 steps

About:

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