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At: iseg is sublist

  T:Type, L_1,L_2:T List. L_1  L_2  L_1  L_2

By: Unfold `sublist` 0
THEN
Inst Thm* l1,l2:T List. l1  l2  ||l1||||l2|| [T;L_1;L_2]
THEN
Inst
Thm* l1,l2:T List. l1  l2  ||l1||||l2|| & (i:i<||l1||  l1[i] = l2[i])
[T;L_1;L_2]
THEN
InstConcl [i.i]
THEN
Reduce 0
THEN
Try (BackThru Thm* k:. increasing(i.i;k))


Generated subgoal:

1 1. T : Type
2. L_1 : T List
3. L_2 : T List
4. L_1  L_2
5. ||L_1||||L_2||
6. L_1  L_2  ||L_1||||L_2|| & (i:i<||L_1||  L_1[i] = L_2[i])
7. L_1  L_2  (||L_1||||L_2|| & (i:i<||L_1||  L_1[i] = L_2[i]))
8. j : ||L_1||
  L_1[j] = L_2[j]

1 step

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

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