Nuprl - Proof: inv image ind tp 1 1 1 1 1 1 1

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At: inv image ind tp 1 1 1 1 1 1 1

1. T : Type
2. r : T

Prop
3. S : Type
4. f : S

T
5. WellFnd{i}(T;x,y.r(x,y))
6. P : S

Prop
7.

j:S. (

k:S. r(f(k),f(j))

P(k))

P(j)

(

n:S. f(n) = x

P(n))

Prop

By:	AddHiddenLabel `wf`

Generated subgoal:

1 (x.n:S. f(n) = x P(n)) TProp
1 step

About:

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