The Hopf cyclicity of the centers of a class of quintic polynomial vector fields
We consider families of planar polynomial vector fields having a singularity with purely imaginary eigenvalues for which a basis of its Bautin ideal B is known. We provide an algorithm for computing an upper bound of the Hopf cyclicity less than or equal to the Bautin depth of B. We also present a m...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:145323 |
| Acceso en línea: | https://ddd.uab.cat/record/145323 https://dx.doi.org/urn:doi:10.1016/j.jde.2014.11.018 |
| Access Level: | acceso abierto |
| Palabra clave: | Bautin ideal Cyclicity Limit cycles Polynomial vector fields |
| Sumario: | We consider families of planar polynomial vector fields having a singularity with purely imaginary eigenvalues for which a basis of its Bautin ideal B is known. We provide an algorithm for computing an upper bound of the Hopf cyclicity less than or equal to the Bautin depth of B. We also present a method for studying the cyclicity problem for the Hamiltonian and the timereversible centers without the necessity of solving previously the Dulac complex center problem associated to the larger complexified family. As application we analyze the Hopf cyclicity of the quintic polynomial family written in complex notation as ˙z = iz+zz¯(Az3+Bz2z¯+Czz¯2+Dz¯3). |
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