CYCLICITY OF SOME LIENARD SYSTEMS

被引:9
作者
Li, Na [1 ,2 ]
Han, Maoan [1 ]
Romanovski, Valery G. [1 ,3 ,4 ]
机构
[1] Shanghai Normal Univ, Dept Math, Shanghai 200234, Peoples R China
[2] Shanghai Univ Engn Sci, Coll Fundamental Studies, Shanghai 201620, Peoples R China
[3] Univ Maribor, Ctr Appl Math & Theoret Phys, SI-2000 Maribor, Slovenia
[4] Univ Maribor, Fac Nat Sci & Math, SI-2000 Maribor, Slovenia
基金
中国国家自然科学基金;
关键词
Limit cycle; cyclicity; Lienard system; AMPLITUDE LIMIT-CYCLES; GLOBAL BIFURCATION; CUBIC SYSTEMS; NUMBER; FAMILY;
D O I
10.3934/cpaa.2015.14.2127
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
The Lienard system and its generalizations are important models of nonlinear oscillators. We study small-amplitude limit cycles of two families of Lienard systems and find exact number of such limit cycles bifurcating from a center or focus at the origin for these families, thus obtaining the precise bound for cyclicity of the families.
引用
收藏
页码:2127 / 2150
页数:24
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