Definitions | x:A. B(x), P  Q, es-le(es; e; e'), , es-locl(es; e; e'), t T, prop{i:l},  x. t(x), P Q, P Q, e (e1,e2].P(e), x:A. B(x), A c B, P   Q, T, True, P  Q, top, subtype(S; T), wellfounded{i:l}(A; x,y.R(x;y)), x(s), guard(T), decidable(P), ||as||, Y, A, False |