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Some new results on the existence of periodic solutions to a kind of Rayleigh equation with a deviating argument. (English) Zbl 1078.34048
The authors study the problem of existence of periodic solutions for the Rayleigh equation with deviating argument $x''(t)+ f(x'(t))+ g(x(t- \tau(t)))= p(t),$ where $$f$$, $$g$$, $$p$$ and $$\tau$$ are real continuous functions defined on $$\mathbb{R}$$; $$\tau$$ and $$p$$ are periodic with period $$T> 0$$. By using Mawhin’s continuation theorem, the authors obtain some new results.

##### MSC:
 34K13 Periodic solutions to functional-differential equations
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##### References:
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