## A convolution product for discrete function theory

- R. J. Duff in, C. S. Duris
- Duke Math. J.,
- 1964

This paper is concerned with linear partial difference operators L having constant coefficients. The functions considered are defined only on the lattice points of the complex plane. It is shown that with any two solutions of Lu(z) = 0 there is associated a new solution which is represented as a convolution product. This product may be considered as a type… (More)