Some definitions of interest.
int_lower	Def  {...i} == {j:| ji }
	Thm*  i:. {...i}  Type
int_upper	Def  {i...} == {j:| ij }
	Thm*  n:. {n...}  Type

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