IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
filter type T:Type, P:(T), l:T List. filter(P;l) {x:T| P(x) } List
By:
InductionOnList THEN Reduce 0 THEN Try (Complete Auto) THEN SplitOnConclITE
Generated subgoals:
None
About:
IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
T:Type, P:(T
), l:T List. filter(P;l) 
{x:T| P(x) } List
