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arXiv · 1210.3998

Domains of analyticity for response solutions in strongly dissipative forced systems

Livia Corsi·Roberto Feola·Guido Gentile
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Abstract

We study the ordinary differential equation $\varepsilon\ddot x + \dot x + \varepsilon g(x) = \e f(\omega t)$, where $g$ and $f$ are real-analytic functions, with $f$ quasi-periodic in $t$ with frequency vector $\omega$. If $c_{0} \in \mathbb{R}$ is such that $g(c_0)$ equals the average of $f$ and $g'(c_0)\neq0$, under very mild assumptions on $\omega$ there exists a quasi-periodic solution close to $c_0$. We show that such a solution depends analytically on $\varepsilon$ in a domain of the complex plane tangent more than quadratically to the imaginary axis at the origin.

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Livia Corsi, Roberto Feola, Guido Gentile. 2012-10-15. Domains of analyticity for response solutions in strongly dissipative forced systems. https://doi.org/10.1063/1.4836777

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