Nuprl - Proof: swap adjacent instance 1 1 1

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At: swap adjacent instance 1 1 1

1. A : Type
2. P : A

Prop
3. X : A List
4. Y : A List
5. a : A
6. b : A
7. P(a,b)

[a; b / Y][(||X||-||X||)] = a

By:	Subst' (\|\|X\|\|-\|\|X\|\| = 0) 0 THEN Reduce 0

Generated subgoals:

None

About:

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