ABSTRACT

Difference equations describe the evolution of certain phenomena over the course of time. They are of interest both as differential equations and as a method for describing fundamentally discrete systems. Such equations are based on the difference operator Δ defined as Δx(k) = x(k + 1) -x(k) for a sequence {x(k)} that allows us to compute the solutions of difference equations recursively and by the inverse operator Δ-1.