On the existence of invariant tori in non-conservative dynamical systems with degeneracy and finite differentiability

On the existence of invariant tori in non-conservative dynamical systems with degeneracy and finite differentiability
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简并有限微非保守动力系统中不变环面的存在性

DOI:
10.3934/dcds.2019171
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发表时间:
2019-04
期刊:
Discrete Contin. Dyn. Sys. A
影响因子:
--
通讯作者:
Zaijiu Shang
Zaijiu Shang
中科院分区:
其他
文献类型:
--
作者:
Xuemei Li;Zaijiu Shang

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In this paper, we establish a KAM-theorem about the existenceof invariant tori in non-conservative dynamical systems with finitely differentiable vector fields and multiple degeneracies under the assumption that theintegrable part is finitely differentiable with respect to parameters, instead ofthe usual assumption of analyticity. We prove these results by constructingapproximation and inverse approximation lemmas in which all functions arefinitely differentiable in parameters.
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