Bifurcation of critical periods from the rigid quadratic isochronous vector field
Bifurcation of critical periods from the rigid quadratic isochronous vector field
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刚性二次等时矢量场的临界周期分叉
DOI:
10.1016/j.bulsci.2007.06.001
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发表时间:
2008-06
影响因子:
1.3
通讯作者:
中科院分区:
文献类型:
--
作者:
This paper is concerned with the study of the number of critical periods of perturbed isochronous centers. More concretely, if X0is a vector field having an isochronous center of period T0at the point p and Xϵis an analytic perturbation of X0such that the point p is a center for Xϵthen, for a suitable parameterization ξ of the periodic orbits surrounding p, their periods can be written as T(ξ,ϵ)=T0+T1(ξ)ϵ+T2(ξ)ϵ2+⋯. Firstly we give formulas for the first functions Tl(ξ) that can be used for quite general vector fields. Afterwards we apply them to study how many critical periods appear when we perturb the rigid quadratic isochronous center x˙=−y+xy, y˙=x+y2inside the class of centers of the quadratic systems or of polynomial vector fields of a fixed degree.
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影响因子:
1.1
作者:
Yulin Zhao
通讯作者:
Yulin Zhao
DOI:
10.1007/978-0-387-49319-0
发表时间:
1941
期刊:
--
影响因子:
--
作者:
J. Jost
通讯作者:
J. Jost
DOI:
10.1016/0362-546x(93)90136-g
发表时间:
1993-02
影响因子:
1.4
作者:
C. Chicone;F. Dumortier
通讯作者:
C. Chicone;F. Dumortier
DOI:
10.1090/s0002-9939-08-09131-4
发表时间:
2008-01
期刊:
--
影响因子:
--
作者:
F. Mañosas;J. Villadelprat
通讯作者:
F. Mañosas;J. Villadelprat
影响因子:
2.4
作者:
A. Cima;A. Gasull;F. Mañosas
通讯作者:
A. Cima;A. Gasull;F. Mañosas