Def b_exists_unique('a;x.p(x))
Def == (x:'a. p(x))(x,y:'a.  (p(x)p(y))(x = y))

is mentioned

In prior sections: hol bool

Try larger context: HOLlib IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html