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Rational Limit Cycles on Abel Polynomial Equations

Author

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  • Claudia Valls

    (Departamento de Matemática, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal)

Abstract

In this paper we deal with Abel equations of the form d y / d x = A 1 ( x ) y + A 2 ( x ) y 2 + A 3 ( x ) y 3 , where A 1 ( x ) , A 2 ( x ) and A 3 ( x ) are real polynomials and A 3 ≢ 0 . We prove that these Abel equations can have at most two rational (non-polynomial) limit cycles when A 1 ≢ 0 and three rational (non-polynomial) limit cycles when A 1 ≡ 0 . Moreover, we show that these upper bounds are sharp. We show that the general Abel equations can always be reduced to this one.

Suggested Citation

  • Claudia Valls, 2020. "Rational Limit Cycles on Abel Polynomial Equations," Mathematics, MDPI, vol. 8(6), pages 1-15, June.
  • Handle: RePEc:gam:jmathe:v:8:y:2020:i:6:p:885-:d:366090
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    References listed on IDEAS

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    1. Liu, Changjian & Li, Chunhui & Wang, Xishun & Wu, Junqiao, 2018. "On the rational limit cycles of Abel equations," Chaos, Solitons & Fractals, Elsevier, vol. 110(C), pages 28-32.
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    Cited by:

    1. Claudia Valls, 2020. "On the Polynomial Solutions and Limit Cycles of Some Generalized Polynomial Ordinary Differential Equations," Mathematics, MDPI, vol. 8(7), pages 1-11, July.

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    1. Claudia Valls, 2020. "On the Polynomial Solutions and Limit Cycles of Some Generalized Polynomial Ordinary Differential Equations," Mathematics, MDPI, vol. 8(7), pages 1-11, July.
    2. Llibre, Jaume & Valls, Claudia, 2021. "Phase portraits of the complex Abel polynomial differential systems," Chaos, Solitons & Fractals, Elsevier, vol. 148(C).

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