Nuprl - Proof: int seg upper ind 1 1

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At: int seg upper ind 1 1

1. P :

Prop
2. a :

b:{a...}. (

c:{a..b

}. P(a,c))

P(a,b)

, b:{a...}. b-a

P(a,b)

By:	CompNatInd Concl

Generated subgoal:

1 4. k :
5. k1:. k1<k (b:{a...}. b-ak1 P(a,b))
6. b : {a...}
7. b-ak
P(a,b)
4 steps

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