It is the first time that 7 limit cycles can bifurcated from the infinity for a class of quasi quintic system.
首次证明了拟五次多项式系统在无穷远点能分支出7个极限环。
In this paper, the problem of limit cycles bifurcated from the equator for a quintic polynomial system is investigated.
本文研究一类五次平面多项式系统赤道极限环分支问题。