On the universality of product for classes of linear functions of two variables
A. A. Voronenko · Discrete Mathematics and Applications · 2023
Abstract Earlier, the author introduced the concept of a universal function and proved the existence of universal functions for classes of linear k -valued functions of two variables for k ≥ 5 . In this paper, we show that the product modulo k is a universal function for the class of linear k -valued functions of two variables if and only if k = 6l ± 1 .