Nuprl - Proof: exist intseg null 1

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At: exist intseg null 1

1. a :

2. b :

3. P : {a..b

}

Prop
4. b

(

i:{a..b

}. P(i))

By:

Analyze

Generated subgoal:

1 5. i:{a..b}. P(i)
False
1 step

About:

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