Oscillation conditions for difference equations with several variable arguments
George E. Chatzarakis, Takaŝi Kusano, Ioannis P. Stavroulakis (2015)
Mathematica Bohemica
Similarity:
Consider the difference equation where , are sequences of nonnegative real numbers, [], are general retarded (advanced) arguments and [] denotes the forward (backward) difference operator []. New oscillation criteria are established when the well-known oscillation conditions and are not satisfied. Here . The results obtained essentially improve known results in the literature. Examples illustrating the results are also given.