Nuprl Basics - Proof: sfa doc ntuple contains wf 1 1 1 1

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At: sfa doc ntuple contains wf 1 1 1 1

1. A : Type
2. P : A

Prop
3. n :

n1:

. n1<n

(

X:(A^n1). (

u in X: A^n1. P(u))

Prop)
5. A^n
6. n = 1

A = (A^n)

By:	Subst: n = 1

Generated subgoal:

1 A = (A^1)
1 step

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