IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
l tricotomy13 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 [y; x] 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)