Nuprl - Proof: set inc wrt imp sq 1 1

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At: set inc wrt imp sq 1 1

1. A : Type
2. B : A

Prop
3. B' : A

Prop
4.

x:A.

B(x)

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

B(x) }

{x:A|

B'(x) }

{x:A| B(x) }

{x:A| B'(x) }

By:	SimilarTo: Hyp:-1

Generated subgoals:

1 5. x : {x:A| B(x) }
  x  {x:A| B(x) }
2 steps

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

About:

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1	5. x : {x:A\| B(x) } x {x:A\| B(x) }	2 steps
2	5. x : {x:A\| B(x) } 6. x {x:A\| B'(x) } x {x:A\| B'(x) }	3 steps