Nuprl - Proof: or via exist intseg notnull 1 1 1 2

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At: or via exist intseg notnull 1 1 1 2

1. a :

2. b :

3. P : {a..b

}

Prop
4. a<b
5. c :

6. b = c+1
7. i : {a..b

}
8. P(i)
9. i = c

P(c)

By:	Rewrite by i = c {a..b}

Generated subgoals:

None

About:

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