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广西师范大学学报(自然科学版) ›› 2020, Vol. 38 ›› Issue (3): 45-51.doi: 10.16088/j.issn.1001-6600.2020.03.006
张二丽1*, 邢玉清2
ZHANG Erli1*, XING Yuqing2
摘要: 本文研究扰动可积微分系统
$\left\{ \begin{aligned} & \dot{x}=-y(y+1)^{2}+εf(x,y), \\ & \dot{y}=x(y+1)^{2}+εg(x,y), \end{aligned}\right.$
式中:$0<|ε|\ll 1;f(x,y)=\sum^{n}_{i+j=0}a_{i,j}x^{i}y^{j};g(x,y)=\sum^{n}_{i+j=0}b_{i,j}x^{i}y^{j}$。应用一阶平均法证明该系统恰好存在n个极限环。
中图分类号:
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