Anew approach for the study of limit cycles

JOURNAL OF DIFFERENTIAL EQUATIONS

卷:269

Article

Garcia-Saldana, J. D.¹  Gasull, A.²  Giacomini, H.³ 

[1] Univ Catolica Santisima Concepcion, Dept Matemat & Fis Aplicadas, Alonso de Ribera 2850, Concepcion, Chile

[2] Univ Autonoma Barcelona, Dept Matemat, Edifici C, Barcelona 08193, Spain

[3] Univ Tours, Inst Denis Poisson, CNRS, UMR 7013, F-37200 Tours, France

关键词: Periodic orbits;    Limit cycle;    Abelian integral;    Heteroclinic solution;    Reversible center;    Algebraic limit cycle;   

DOI  :  10.1016/j.jde.2020.04.038

来源: Elsevier

【 摘 要 】

We prove that star-like limit cycles of any planar polynomial system can also be seen either as solutions defined on a given interval of a new associated planar non-autonomous polynomial system or as heteroclinic solutions of a 3-dimensional polynomial system. We illustrate these points of view with several examples. One of the key ideas in our approach is to decompose the periodic solutions as the sum of two suitable functions. As a first application we use these new approaches to prove that all star-like reversible limit cycles are algebraic. As a second application we introduce a function whose zeroes control the periodic orbits that persist as limit cycles when we perturb a star-like reversible center. As far as we know this is the first time that this question is solved in full generality. Somehow, this function plays a similar role that an Abelian integral for studying perturbations of Hamiltonian systems. (C) 2020 Elsevier Inc. All rights reserved.

【 授权许可】

Free