IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
nsub bij least preimage inverse1 1. a :
2. f : a bij a InvFuns(a;a;f;y.least x:. f(x)=y)
By:
fa onto a By BackThru: Thm* (A bij B) (A onto B)
THEN
fa bij a Asserted THEN Analyze-1