Phase portraits of uniform isochronous quartic centers

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摘要

In this paper we classify the global phase portraits in the Poincaré disc of all quartic polynomial differential systems with a uniform isochronous center at the origin such that their nonlinear part is not homogeneous.

论文关键词：primary,34C05,34C25,Polynomial vector field,Uniform isochronous center,Phase portrait

论文评审过程：Received 16 September 2014, Revised 21 January 2015, Available online 31 March 2015.

论文官网地址：https://doi.org/10.1016/j.cam.2015.02.046