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    • Essential perturbations of polynomial vector fields with a period annulus 

      Buica, Adriana; Giné, Jaume; Grau Montaña, Maite (American Institute of Mathematical Sciences, 2015)
      Chicone-Jacobs and Iliev found the essential perturbations of quadratic systems when considering the problem of finding the cyclicity of a period annulus. Given a perturbation of a particular family of centers of polynomial ...