ABSTRACT
Throughout the paper we denote by U the unit disc in the complex plane C, T the unit circle, dA normalized Lebesgue measure on U, and dm the Haar measure on T. Moreover, let Z+ be the set of all nonnegative integers. For a natural number n , U'1, T " , Z'_J_, and dm n will denote the n -fold products of U, T, Z+ and dm respectively.
