Nuprl - Proof: complete nat ind with y 1 1 2 1 1 2 1 2

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At: complete nat ind with y 1 1 2 1 1 2 1 2

1. P :

Prop
2. g :

i:

. (

j:

i. P(j))

P(i)
3. Y(

f,x. g(x,f))

Void

Void
4. n :

5. 0<n
6. Y(

f,x. g(x,f))

(

m:

(n-1). P(m))
7. r :

n
8.

r = n-1

Y((

f,x. g(x,f)),r)

P(r)

By:

Thin 3

Generated subgoals:

None

About:

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

(24steps total) PrintForm Definitions int 1 Sections StandardLIB Doc