| Definitions |  x:A. B(x), A ||+ B, x : t initially x = v, only L sends on (l with tg), P & Q, M1 || M2, ma-frame-compatible(A;B), mk-ma, x : v, , M1 ||decl M2, f || g, 1of(t), 2of(t), Prop, P   Q,  b, x  dom(f), f(x), deq-member(eq;x;L), reduce(f;k;as), false , Y, if b t else f fi, t T, ma-frame-compat(A;B), xdom(f). v=f(x) P(x;v), M.rframe(A.pre p for a), M.frame(k affects x), M.aframe(k affects x), M.rframe(A.effect f of k on y), M.sframe(k sends <l,tg>), M.bframe(k sends on l), M.rframe(A.sends tfL of k on l), z != f(x) P(a;z), False, A & B |