Definitions | i j < k,  x. t(x), x(s), {i..j }, x f y, i j , T, ff, P  Q, P & Q, P   Q, tt, if b then t else f fi , False, A, A B, True, , Y, t.2, t.1, 0, +r, e, *, (op,id) lb i < ub. E(i), r +gp, lb i < ub. E(i), < +*>, (r) i k < j. E(k), a j < b. E(j), t T, P  Q, x:A. B(x), P Q, Dec(P), Unit, , ,  |