Electronic Journal of Differential Equations,
Vol. 2006(2006), No. 107, pp. 1-11.

Title: Periodic solutions for a  kind of rayleigh
       equation  with  two deviating arguments

Authors: Yuanheng Wu (Guangdong Univ., Guangzhou, China)
         Bing Xiao   (Hunan Univ., Hunan, China)
	 Hong Zhang  (Hunan Univ., Hunan, China)

Abstract: 
  In this paper, we use the coincidence degree theory to
  establish new results  on the existence of  $T$-periodic
  solutions for the Rayleigh equation  with two deviating
  arguments of the form
$$
    x''+f(x(t), x'(t))+g_{1}(t,x(t-\tau_{1}(t)))
    +g_{2}(t,x(t-\tau_{2}(t)))=p(t).
$$
 
Submitted January 27, 2006. Published September 8, 2006.
Math Subject Classifications: 34C25, 34D40.
Key Words: Rayleigh equation; deviating argument; periodic solution;
           coincidence degree.