Oscillation criteria for a pair of coupled nonlinear difference equations. (English) Zbl 1051.39006

Summary: A number of second-order nonlinear difference equations can be written as a pair of coupled difference equations. By means of this simple device, we can then derive oscillation criteria in a relatively clear and easy manner which generalize and extend several existing results.


39A11 Stability of difference equations (MSC2000)
39A10 Additive difference equations