Who Cites rel inverse?
rel_inverse	Def R^-1(x,y) == y R x
	Thm* T1,T2:Type, R:(T1T2Prop). R^-1  T2T1Prop

Syntax:

R^-1

has structure:

rel_inverse(R)

About: IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html