Using the method of qualitative analysis we show that five perturbed cubic Hamiltonian systems have the same distribution of limit cycles and have 11 limit cycles for some parameters. The accurate location of each limit cycle is given by numerical exploration. In other words, we demonstrate the existence of 11 limit cycles and their distribution in five perturbed systems in two ways, the results obtained from both ways are the same.
Xiaochun HongYunqiu WangXuemei Zhang School of Statistics and MathYunnan University of Finance and EconomicsKunming School of Mathand Information ScienceQujing Normal UniversityQujing Yunnan
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Xiaochun HongYunqiu WangXuemei Zhang School of Statistics and MathYunnan University of Finance and EconomicsKunming School of Mathand Information ScienceQujing Normal UniversityQujing Yunnan
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Cinvestav IPN, Dept Control Automat, 2508 Av Inst Politecn Nacl, Mexico City 07360, DF, MexicoCinvestav IPN, Dept Control Automat, 2508 Av Inst Politecn Nacl, Mexico City 07360, DF, Mexico
Castanos, Fernando
Gromov, Dmitry
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St Petersburg State Univ, Fac Appl Math & Control Proc, St Petersburg, RussiaCinvestav IPN, Dept Control Automat, 2508 Av Inst Politecn Nacl, Mexico City 07360, DF, Mexico
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Zhaoqing Univ, Sch Math & Stat, Zhaoqing 526061, Guangdong, Peoples R ChinaZhaoqing Univ, Sch Math & Stat, Zhaoqing 526061, Guangdong, Peoples R China
Shao, Yi
Wu, Kuilin
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Guizhou Univ, Dept Math, Guiyang 550025, Peoples R ChinaZhaoqing Univ, Sch Math & Stat, Zhaoqing 526061, Guangdong, Peoples R China