In this paper we discuss results
leading to a description of an algebraic structure constituted by power series with the
same maximum term in several complex variables, and use the description to
estimate the maximum modulus of any of the series in terms of its maximum
term and its central index, and obtain some useful asymptotic relations. We
observe that certain crucial Valiron-type theorems, in the case of several
variables, are by no easy or routine means reached through Valiron-type
techniques.