The Cauchy product of two sequences and defined for nonnegative integers is defined by
Cauchy Product
See also
ConvolutionExplore with Wolfram|Alpha
References
Apostol, T. M. Modular Functions and Dirichlet Series in Number Theory, 2nd ed. New York: Springer-Verlag, p. 24, 1997.Referenced on Wolfram|Alpha
Cauchy ProductCite this as:
Weisstein, Eric W. "Cauchy Product." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CauchyProduct.html