Oscillation criteria for second-order nonlinear neutral delay dynamic equations

In this paper we will establish some oscillation criteria for the second-order nonlinear neutral delay dynamic equation r(t) y(t) + p(t)y(t − τ) Δ γ Δ + f t,y(t − δ) = 0 on a time scale T; hereγ >0 is a quotient of odd positive integers with r(t) and p(t) real-valued positive functions defined on T. To the best of our knowledge nothing is known regarding the qualitative behavior of these equations on time scales, so this paper initiates the study.  2004 Elsevier Inc. All rights reserved.