Journal article

Solvability of a system of higher order nonlinear difference equations

Abstract

In this paper we show that the system of difference equations \[ x_n= a y_{n-k}+\frac{dy_{n-k}x_{n-insert ignore into journalissuearticles values( k+l ); }}{b x_{n-insert ignore into journalissuearticles values(k+l);}+cy_{n-l}}=\alpha x_{n-k}+\frac{\delta x_{n-k}y_{n-insert ignore into journalissuearticles values(k+l);}}{\beta y_{n-insert ignore into journalissuearticles values(k+l);}}+\gamma x_{n-l}, \]   where $n\in \mathbb{N}_{0},$ $k$ and $l$ are positive integers, the parameters $a$, $b$, $c$, $d$, $\alpha $, $\beta $, $\gamma $, $\delta $ are real numbers and the initial values $x_{-j}$, $y_{-j}$, $j=\overline{1,k+l}$, are real numbers, can be solved in the closed form. We also determine the asymptotic behavior of solutions for the case $l=1$ and describe the forbidden set of the initial values using the obtained formulas. Our obtained results significantly extend and develop some recent results in the literature.

Keywords

System of difference equationsAsymptotic behaviorFibonacci sequenceForbidden set

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