Nuprl - Proof: comp nat ind a 1 1 2

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At: comp nat ind a 1 1 2

1. P :

Prop
2.

. (

. j<i

P(j))

P(i)
3.

4. j :

. s<j-1

P(s)
6. s :

7. s<j

P(s)

By:	Assert (t:. t<s P(t)) THEN IfLabL [`main`,(OnHyps [7;5;4;3] Thin);`assertion`,(RepD THEN (InstHyp [t] 5))]

Generated subgoal:

1 3. s :
4. t:. t<s P(t)
P(s)
1 step

About:

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