SOLUTIONS FORMULAS FOR SOME GENERAL SYSTEMS OF DIFFERENCE EQUATIONS.

In this paper, we give explicit formulas of the solutions of the two general systems of difference equations... where n ∈ N0, f,g: D→R are "1-1" continuous functions on D ⊆ R, the initial values x-i, y-i, i = 0,1,2,3 are arbitrary real numbers in D and the parameters a, b, c and d are arbitrary real numbers. Our results considerably extend some existing results in the literature. [ABSTRACT FROM AUTHOR]