Oscillation criteria for second order nonlinear delay dynamic equations on time scales

摘要

By employing the generalized Riccati transformation, we establish some new oscillation criteria for second order delay dynamic equations on tune scales. The obtained results essentially improve the well-know oscillation results for half-linear dynamic equations such as Kamenev-type and Philos-type oscillation criteria. Some interesting examples are given to illustrate the versatility of our results. (C) 2015 Elsevier Inc. All rights reserved.