Isolated elliptic fixed points for smooth Hamiltonians

Isolated elliptic fixed points for smooth Hamiltonians
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平滑哈密顿量的孤立椭圆不动点

DOI:
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发表时间:
2016
期刊:
影响因子:
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通讯作者:
M. Saprykina
M. Saprykina
中科院分区:
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文献类型:
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作者:
B. Fayad;M. Saprykina

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我们在R^{2d}$上,对于任意$d geq3 $,构造具有任意频率的椭圆平衡的光滑哈密顿量,它不是由不变环面的正测度集累积的。对于$ geq4 $,我们构造的哈密顿矩阵没有维数$d$的不变环面。我们的例子是由一个版本的逐次共轭方案{it ' a la} Anosov-Katok。
We construct on $R^{2d}$, for any $d geq 3$, smooth Hamiltonians having an elliptic equilibrium with an arbitrary frequency, that is not accumulated by a positive measure set of invariant tori. For $dgeq 4$, the Hamiltonians we construct have not any invariant torus of dimension $d$. Our examples are obtained by a version of the successive conjugation scheme {it `a la} Anosov-Katok.