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At: length sublist
  T:Type, L1,L2:T List. L1  L2  ||L1||||L2||
By: Auto THEN Unfold `sublist` -1 THEN ExRepD

Generated subgoal:

1 1. T : Type
2. L1 : T List
3. L2 : T List
4. f : ||L1||||L2||
5. increasing(f;||L1||)
6. j:||L1||. L1[j] = L2[(f(j))]
  ||L1||||L2||
1 step

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(2steps total) PrintForm Definitions Lemmas mb list 1 Sections MarkB generic Doc