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Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

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A simple proof of the uniqueness of periodic orbits in the $1:3$ resonance problem
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by Shui-Nee Chow, Cheng Zhi Li and Duo Wang PDF
Proc. Amer. Math. Soc. 105 (1989), 1025-1032 Request permission

Abstract:

In 1979, E. Horozov considered the versal deformation of a planar vector field which is invariant under a rotation through an angle $2\pi /3$ (with resonance of order 3). In his study, the most difficult part of the proof is on the uniqueness of limit cycles. In this note we give a simple and elementary (without the theory of algebraic geometry proof of the uniqueness of periodic orbits in the 1:3 resonance problem.
References
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Additional Information
  • © Copyright 1989 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 105 (1989), 1025-1032
  • MSC: Primary 58F14; Secondary 58F21
  • DOI: https://doi.org/10.1090/S0002-9939-1989-0938908-6
  • MathSciNet review: 938908