Limit cycle bifurcations by perturbing a class of planar quintic vector fields
Limit cycle bifurcations by perturbing a class of planar quintic vector fields
复制标题
通过扰动一类平面五次向量场来限制环分岔
DOI:
10.1016/j.jde.2020.07.004
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发表时间:
2020-12
影响因子:
2.4
通讯作者:
Maoan Han
中科院分区:
文献类型:
--
作者:
Yanqin Xiong;Maoan Han
This paper first investigates all possible phase portraits of a class of planar quintic vector field given by x˙=(1+ 2 b x 2+ 2 d x 4) y, y˙=− 2 (2 a x 2+ b y 2+ 3 c x 4+ 2 d x 2 y 2) x, a, b, c, d∈ R. Then, we study the bifurcation problem of its small perturbed vector field with polynomial perturbations of arbitrary degree n, n∈ N by the corresponding Abelian integral, and prove that the lower bound for the maximal number of limit cycles bifurcating from the periodic orbits is 3 [n− 1 2]− 1, n≥ 5.
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影响因子:
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DOI:
10.1017/s0305004100061636
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