Nuprl - Proof: card split sigma dom decbl 1 1

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At: card split sigma dom decbl 1 1

1. A : Type
2. B : A

Type
3. P : A

Prop
4.

i:A. Dec(P(i))

(i:A

B(i)) ~ ({v:(i:A

B(i))| P(v/x,y. x) }+{v:(i:A

B(i))|

P(v/x,y. x) })

By:	Rewrite by Thm* (x:A. Dec(P(x))) (A ~ ({x:A\| P(x) }+{x:A\| P(x) }))

Generated subgoal:

1 (i:AB(i)) ~ (i:AB(i))
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