Nuprl - Proof: dep ax choice 1 1 1 1

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At: dep ax choice 1 1 1 1

1. A : Type
2. B : A

Type
3. Q : x:A

B(x)

Type
4. g : x:A

y:B(x)

Q(x,y)
5. x : A
6. y : y:B(x)

Q(x,y)
7. y = g(x)

Q(x,1of(g(x)))

By:

Analyze 6

Generated subgoal:

1 6. y1 : B(x)
7. y2 : Q(x,y1)
8. <y1,y2> = g(x) y:B(x)Q(x,y)
Q(x,1of(g(x)))
2 steps

About:

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