Def concat(ll) == reduce(l,l'. l @ l';nil;ll)

is mentioned by

Def snds(l;t) == concat(map(t1.m(l;t1);upto(t)))

[w-snds]

In prior sections: mb event system 1

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