Def pq == p  q

is mentioned by

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

[b_exists_unique]

In prior sections: bool 1 hol hol min

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