The Number of Limit Cycles Bifurcating from an Elementary Centre of Hamiltonian Differential Systems
The Number of Limit Cycles Bifurcating from an Elementary Centre of Hamiltonian Differential Systems
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从哈密顿微分系统基本中心分岔的极限环数
DOI:
10.3390/math10091483
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发表时间:
2022-04
期刊:
影响因子:
2.4
通讯作者:
Yancong Xu
中科院分区:
文献类型:
--
作者:
Lijun Wei;Yun Tian;Yancong Xu
This paper studies the number of small limit cycles produced around an elementary center for Hamiltonian differential systems with the elliptic Hamiltonian function H=12y2+12x2−23x3+a4x4(a≠0) under two types of polynomial perturbations of degree m, respectively. It is proved that the Hamiltonian system perturbed in Liénard systems can have at least [3m−14] small limit cycles near the center, where m≤101, and that the related near-Hamiltonian system with general polynomial perturbations can have at least m+[m+12]−2 small-amplitude limit cycles, where m≤16. Furthermore, in any of the cases, the bounds for limit cycles can be reached by studying the isolated zeros of the corresponding first order Melnikov functions and with the help of Maple programs. Here, [·] represents the integer function.
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影响因子:
2.4
作者:
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通讯作者:
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DOI:
--
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期刊:
--
影响因子:
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通讯作者:
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