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

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At: sfa doc ntuple contains wf 1 1

1. A : Type
2. P : A

Prop
3. n :

4.

n1:

. n1<n

(

X:(A^n1). (

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

Prop)
5. X : A^n

(n = 1

& P(X)

n

2 & (X/a,rest. P(a)

(

u in rest: A^(n-1). P(u))))

Prop

By:	AndToCandLocal (2 Times Analyze)

Generated subgoals:

1 6. n = 1
  X  A
3 steps

2 6. n2
  (X/a,rest. P(a)  ( u in rest: A^(n-1). P(u)))  Prop
6 steps

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

(12steps total) PrintForm Definitions Lemmas NuprlPrimitives Sections NuprlLIB Doc