IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
length zip T1,T2:Type, as:T1 List, bs:T2 List.
||as|| = ||bs|| ||zip(as;bs)|| = ||as||
By:
((Analyze 0) THEN (Analyze 0) THEN (Analyze 0)) THEN ListInd -1 THEN Analyze 0
THEN
ListInd -1
THEN
RecUnfold `zip` 0
THEN
Reduce 0
THEN
Try (Complete Auto)