ISOCHRONICITY

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Weak Centers and Local Bifurcations of Critical Periods at Infinity for a Class of Rational Systems被引量：2
《Acta Mathematicae Applicatae Sinica》2013年第2期377-390,共14页Wen-tao HUANG Valery G.ROMANOVSKI WEI-NIAN ZHANG 
supported by the National Natural Science Foundation of China (10961011);the Slovene Human Resources and Scholarship Fund;the Slovenian Research Agency, by the Nova Kreditna Banka Maribor, by TELEKOM Slovenije and by the Transnational Access Programme at RISC-Linz of the European Commission Framework 6 Programme for Integrated Infrastructures Initiatives under the project SCIEnce (Contract No. 026133)
We describe an approach to studying the center problem and local bifurcations of critical periods at infinity for a class of differential systems. We then solve the problem and investigate the bifurcations for a class...
关键词：weak center ISOCHRONICITY bifurcation of critical periods 
Bifurcation and Isochronicity at Infinity in a Class of Cubic Polynomial Vector Fields
《Acta Mathematicae Applicatae Sinica》2007年第3期451-466,共16页Qin-long Wang Yi-rong Liu 
In this paper, we study the appearance of limit cycles from the equator and isochronicity of infinity in polynomial vector fields with no singular points at infinity. We give a recursive formula to compute the singula...
关键词：Bifurcation of limit cycles isochronicity at infinity cubic system 
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