IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
bij iff 1 1 corr version2a A,B:Type. (f:(AB). Bij(A; B; f)) (B ~ A)
By:
Guarding (<type> ~ <type>) SimilarTo: Thm* (f:(AB). Bij(A; B; f)) (A ~ B)
THEN
BackThru: Thm* (A ~ B) (B ~ A)
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). Bij(A; B; f)) 
(B ~ A)
