IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
map length nat A,B:Type, f:(AB), as:A List. ||map(f;as)|| = ||as||
By:
UnivCD THEN ListInd -1 THEN AbReduce 0
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
A,B:Type, f:(A
B), as:A List. ||map(f;as)|| = ||as|| 
