is mentioned by

Def FairFifo Def == (i:Id, t:, l:IdLnk. source(l) = i  onlnk(l;m(i;t)) = nil  Msg List) Def == & (i:Id, t:. Def == & (isnull(a(i;t)) Def == & ( Def == & ((x:Id. s(i;t+1).x = s(i;t).x  vartype(i;x)) Def == & (& m(i;t) = nil  Msg List) Def == & (i:Id, t:, l:IdLnk. Def == & (isrcv(l;a(i;t)) Def == & ( Def == & (destination(l) = i Def == & (& ||queue(l;t)||1 & hd(queue(l;t)) = msg(a(i;t))  Msg) Def == & (l:IdLnk, t:. Def == & (t':.  Def == & (tt' & isrcv(l;a(destination(l);t'))  queue(l;t') = nil  Msg List)	[fair-fifo]
Def rcvs(l;t) == filter(a.isrcv(l;a);map(t1.a(destination(l);t1);upto(t)))	[w-rcvs]
Def w-action-dec(TA;M;i)(k) Def == kindcase(k;a.TA(i,a);l,tg.if destination(l) = i M(l,tg) else Void fi)	[w-action-dec]

In prior sections: mb event system 2

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