mb event system 1 Sections EventSystems Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
Def i=j == if i=j true ; false fi

is mentioned by

Def upto(n) == if n=0 nil else upto(n-1) @ [(n-1)] fi  (recursive)[upto]

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

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

mb event system 1 Sections EventSystems Doc