Abstract
In this paper, we consider the quadratic perturbations of the one parameter family of reversible quadratic system that write in the complex form as
being a≠0 a complex number. We prove that the exact upper bound of the number of limit cycles produced by the period annulus system is two.
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Li, J. Limit cycles bifurcated from a reversible quadratic center. Qual. Th. Dyn. Syst. 6, 205–215 (2005). https://doi.org/10.1007/BF02972673
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DOI: https://doi.org/10.1007/BF02972673