Definitions | World, t T, x:A. B(x), E, FairFifo, P  Q, e <c e', time(e), a<b, R^+, sender(e), s = t, kind(e), isrcv(k), b, A & B, e <loc e', P Q, x.A(x), rel_exp(T;R;n), x f y,  , x:A B(x), left+right, Type, Prop, P & Q, , {x:A| B(x) }, x:A B(x), A B, i j < k, {T}, lnk(k), match(l;t;t'), #$n, {i..j }, x:A. B(x), False, A, mu(f), , Dec(P), i= j, SQType(T), s ~ t, Void, f(a),  b, , P  Q, Unit, if b t else f fi, n-m, -n, n+m |