Adenote a complex (or real) Fréchet algebra (i.e. a complete metrizable locally m-convex algebra, see [ 2] or [ 3]). It is known [ 2] that the topology of such an algebra can be defined by an increasing sequence [qn](i.e. qn(x)≦ qn+i(x)for all x£ Aand n≧ 1) of submultiplicative (i.e. qn(xy)≦ qn(x)qn(y)for all x, 3/ Ç ^4 and for each n ≧ I)seminorms.