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2. P : AAProp 3. X : A List 4. Y : A List 5. a : A 6. b : A 7. P(a,b) P((X @ [a; b / Y])[||X||],(X @ [a; b / Y])[(||X||+1)]) | 6 steps |
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2. P : AAProp 3. X : A List 4. Y : A List 5. a : A 6. b : A 7. P(a,b) (X @ [b; a / Y]) = swap(X @ [a; b / Y];||X||;||X||+1) | 19 steps |
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