MONOTONICITY OF THE RATIOS OF TWO ABELIAN INTEGRALS FOR HAMILTONIAN SYSTEMS WITH PARAMETERS

Le résumé fourni par la source

We study the monotonicity of the ratios of two Abelian integrals $ \oint_{\gamma_{i}(h)}ydx $ $ \backslash $ $ \oint_{\gamma_{i}(h)}xydx $ over three period annuli $ \{\gamma_i(h)\} $, for $ i=1, 2, 3 $, defined by a seventh-degree hyperelliptic Hamiltonian $ H(x, y)=y^2+\Psi(x) $ with a parameter. The parameter makes the problem more challenging to analyze. To overcome the difficulty, we apply some criterion with the help of transformations, tools in computer algebra such as boundary polynomial theory to determine the monotonicity of the ratios. Our results establish the existence and uniqueness of limit cycle bifurcated from each period annulus.

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