摘要

A function fC(k)(; ?) is said to be left k-analytic in if D(k)f=0, where is an open set of (8) and is the Dirac operator in (8). In this article, we obtain the necessary and sufficient condition of Dk-j((D(j)f))=0 for all j{0,1,...,k-1} and all ?. As an application, we give the Cauchy-Kowalewski products of the k-analytic functions and k-analytic functions defined in the whole space R-8.