mb event system 7 Sections EventSystems Doc
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Def s(i;t).x == 1of(2of(2of(2of(w))))(i,t,x)

is mentioned

In prior sections: mb event system 3 mb event system 5

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

mb event system 7 Sections EventSystems Doc