Periodic solutions for Rayleigh type pp-Laplacian equation with a deviating argument

In this paper, we consider the Rayleigh type pp-Laplacian equation with a deviating argument of the form (φp(x′(t)))′+f(t,x′(t))+g(t,x(t−τ(t)))=e(t).(φp(x′(t)))′+f(t,x′(t))+g(t,x(t−τ(t)))=e(t). By using the coincidence degree theory, we establish new results on the existence of periodic solutions for the above equation.