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IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: l tricotomy 1 3

1. T : Type
2. x : T
3. y : T
4. L : T List
5. i1 : 
6. i1<||L||
7. x = L[i1]
8. i : 
9. i<||L||
10. y = L[i]
11. i<i1
  [yx L


By: Unfold `sublist` 0 THEN Reduce 0 THEN InstConcl [j.if j=0 i else i1 fi]
THEN
Reduce 0
THEN
Try (Unfold `label` 0 THEN Reduce 0)


Generated subgoals:

1   increasing(j.if j=0 i else i1 fi;2)
1 step
2 12. j : 2
  [yx][j] = L[if j=0 i else i1 fi]

3 steps

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

(11steps total) PrintForm Definitions Lemmas mb list 1 Sections MarkB generic Doc