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20172025
most citedLimit cycles appearing from the perturbation of differential systems with multiple switching curves

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math.DS2025

The cyclicity of period annulus of cubic isochronous Hamiltonian systems

Jihua Yang

Cima, Mañosas and Villadelprat (J. Differ. Equations, 157, 373--413, 1999) proved that a cubic Hamiltonian system possesses an isochronous center at the origin if and only if its H…