Def i=j == if i=j true ; false fi

is mentioned by

Thm* a,b:. a = b  a=b	[nat-deq-aux]
Def NatDeq == <a,b. a=b,nat_DASH_deq_DASH_aux{1:l}>	[nat-deq]

In prior sections: bool 1 sqequal 1 mb nat int 2 num thy 1 mb event system 1

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