Oscillation Criteria for Second Order Nonlinear Dynamic Equations with p-Laplacian and Damping

This paper concerns the oscillation of solutions of the second order nonlinear dynamic equation with p-Laplacian and damping

(r(t)φα(x^△(t)))^△ +p(t)φα(x△σ(t))  +q(t)f(xσ(t)) =0${\left(r\left(t\right)\phi \alpha \left(x^{△}\left(t\right)\right)\right)}^{△}\hspace{0.17em}+p\left(t\right)\phi \alpha \left(x^{△\sigma }\left(t\right)\right)\hspace{0.17em}\hspace{0.17em}+q\left(t\right)f\left(x^{\sigma }\left(t\right)\right)\hspace{0.17em}=0$

on a time scale ? which is unbounded above. Sign changes are allowed for the coefficient functions r, p and q. Several examples are given to illustrate the main results.