, Volume 38, Issue 6, pp 699–709 | Cite as

Holomorphic Flows on Simply Connected Regions Have No Limit Cycles

  • Kevin A. Broughan


The dynamical system or flow ż = f(z), where f is holomorphic on C, is considered. The behavior of the flow at critical points coincides with the behavior of the linearization when the critical points are non-degenerate: there is no center-focus dichotomy. Periodic orbits about a center have the same period and form an open subset. The flow has no limit cycles in simply connected regions. The advance mapping is holomorphic where the flow is complete. The structure of the separatrices bounding the orbits surrounding a center is determined. Some examples are given including the following: if a quartic polynomial system has four distinct centers, then they are collinear.

Dynamical system Phase portrait Critical point Theoretical dynamics 


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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Kevin A. Broughan
    • 1
  1. 1.Department of MathematicsUniversity of WaikatoHamiltonNew Zealand

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