| 具有一细焦点和一粗焦点的二次系统 |
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| 引用本文： | 徐思林.具有一细焦点和一粗焦点的二次系统[J].山东师范大学学报(自然科学版),1997,12(4):384-387. |
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| 作者姓名： | 徐思林 |
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| 作者单位： | 青岛大学数学系 |
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| 摘 要： | 研究具有一细焦点和一粗焦点的二次系统，得到了三个新的极限环唯一性判别法，所用的方法与常见的不同。
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| 关 键 词： | 二次系统 极限环 唯一性 细焦点 粗焦点 |
THE QUADRATIC SYSTEM WITH THE WEAK FOCUS AND STRONG FOCUS |
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| Xu Silin.THE QUADRATIC SYSTEM WITH THE WEAK FOCUS AND STRONG FOCUS[J].Journal of Shandong Normal University(Natural Science),1997,12(4):384-387. |
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| Authors: | Xu Silin |
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| Abstract: | The quadratic system with the weak focus and strong focus is studied and some results for the uniqueness of the limit cycle are obtained. |
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| Keywords: | quadratic system strong(weak) focus limit cycle uniqueness |
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