Def bif(b; bx.x(bx); by.y(by)) == if b x(*) else y(x.x) fi

is mentioned by

Def pre(n) == if n=0 then 0 else n-1 fi

[pre]

In prior sections: hol bool hol num

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