Abstract
In the present work the methods of computation of Lyapunov quantities and localization of limit cycles are demonstrated. These methods are applied to investigation of quadratic systems with small and large limit cycles. The expressions for the first five Lyapunov quantities for general Lienard system are obtained. By the transformation of quadratic system to Lienard system and the method of asymptotical integration, quadratic systems with large limit cycles are investigated. The domain of parameters of quadratic systems, for which four limit cycles can be obtained, is determined.
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Leonov, G.A., Kuznetsova, O.A. Lyapunov quantities and limit cycles of two-dimensional dynamical systems. Analytical methods and symbolic computation. Regul. Chaot. Dyn. 15, 354–377 (2010). https://doi.org/10.1134/S1560354710020218
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DOI: https://doi.org/10.1134/S1560354710020218