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  • Centers of quasi-homogeneous polynomial differential equations of degree three 

    Aziz, Waleed; Llibre Saló, Jaume; Pantazi, Chara (2014-03-20)
    Restricted access - publisher's policy
    We characterize the centers of the quasi-homogeneous planar polynomial differential systems of degree three. Such systems do not admit isochronous centers. At most one limit cycle can bifurcate from the periodic orbits of ...