Some new results on the existence of periodic solutions to a kind of Rayleigh equation with a deviating argument Original Research Article

By employing the continuation theorem of coincidence degree theory, we study a kind of Rayleigh equation with a deviating argument as follows: x″(t)+f(x′(t))+g(x(t−τ(t)))=p(t). Some new results on the existence of periodic solutions are obtained.