The survey of the basic results of oscillation theory of various linear difference equations and systems is presented. It is shown that thediscrete oscillation theory is in many aspects very similar to its continuous counterpart. Some open problem are discussed.
The survey of the basic results of oscillation theory of various linear difference equations and systems is presented. It is shown that thediscrete oscillation theory is in many aspects very similar to its continuous counterpart. Some open problem are discussed. (en)