Def cond == b:. p:'a. q:'a. if b then p else q fi 

is mentioned by

Thm* all Thm* (m:hnum. equal Thm* (m:hnum. (pre(m) Thm* (m:hnum. ,cond(equal(m,0),0,select(n:hnum. equal(m,suc(n))))))

[hpre_def]

In prior sections: hol bool

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