Nuprl - Proof: set inc wrt imp sq

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At: set inc wrt imp sq

A:Type, B,B':(A

Prop).

(

x:A.

B(x)

B'(x))

{x:A| B(x) }

{x:A| B'(x) }

By:

UnivCD

Generated subgoal:

1 1. A : Type
2. B : AProp
3. B' : AProp
4. x:A. B(x) B'(x)
{x:A| B(x) } {x:A| B'(x) }
7 steps

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