Goefficient equivalents of ρ and T are known (see e. g. [2], pp. 9-12).If f(z) is of infinite or zero order, the definition of type is not feasible and so growth of such functions cannot be precisely measured by confining to the above concepts. For functions of infinite order, Sato [8] introduced the concept of 'index' of an entire function. Thus, if (1.3) Journal f r Mathematik. Band 282Brought to you by | University of Iowa Libraries Authenticated Download Date | 6/13/15 9:44 PM Q(Pn,q) = oo (n < p), ρ(ρ^η) = 0 (n < q) and ρ (p + n, q + n) = l for n = 1,2, ____ If (x, y) is any pair of integers satisfying y = χ + q -p and χ < p, then ) = 0 if 0 < ρ(ρ, q) < l and Q(X, y) = oo if l < ρ(ρ, q) < σο.