Nuprl - Proof: set inc wrt imp sq 1 1 2 1 1

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At: set inc wrt imp sq 1 1 2 1 1

1. A : Type
2. B : A

Prop
3. B' : A

Prop
4.

x:A.

B(x)

B'(x)
5. x : {x:A| B(x) }
6. x

{x:A|

B'(x) }
7.

B(x)

B'(x)

By:	BackThru: Hyp:4

Generated subgoals:

None

About:

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