Some definitions of interest.
iff	Def P  Q == (P  Q) & (P  Q)
	Thm* A,B:Prop. (A  B)  Prop
int_upper	Def {i...} == {j:| ij }
	Thm* n:. {n...}  Type
le	Def AB == B<A
	Thm* i,j:. (ij)  Prop

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