Def R^+(x,y) == n:. x R^n y

is mentioned by

Def e <c e' == e e,e'. e <loc e'  isrcv(kind(e')) & e = sender(e')  E^+ e'

[w-causl]

In prior sections: mb event system 2

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