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Existence and uniqueness of periodic solutions for a kind of Liénard equation with a deviating argument. (English) Zbl 1136.34331

Summary: We use the coincidence degree theory to establish new results on the existence and uniqueness of \(T\)-periodic solutions for a kind of Liénard equation with a deviating argument of the form
\[ x^{\prime\prime }(t)+f(x(t))x^{\prime }(t)+g(t,x(t - \tau (t)))=p(t). \] .

MSC:

34K13 Periodic solutions to functional-differential equations
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References:

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