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Published online by Cambridge University Press: 20 November 2018
Let A = (ank) and {sn} (n, k = 0, 1, 2, . . .) be a matrix and a sequence of complex numbers, respectively. Let the members of the sequence {σn} be defined by
then we say {σn} is the A -transform of {sn}. The matrix A = (ank) is called regular if