| 一类高次微分系统的极限环 |
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| 引用本文： | 阎恩让 杨秀敏. 一类高次微分系统的极限环[J]. 宝鸡文理学院学报(自然科学版), 1996, 16(1): 5-10 |
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| 作者姓名： | 阎恩让 杨秀敏 |
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| 作者单位： | 宝鸡文理学院数学系 |
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| 摘 要： | 本文通过极坐标变换，利用环域原理进一步讨论了一类高次微分方程系统的极限环的存储性、不存储及个数等问题，给出了几个简便而实用的判据。
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| 关 键 词： | 常微分方程 极限环线 环域原理 |
THE LIMIT CYCLES OF A CLASS HIGHER-DEGREE DIFFERENTIAL SYSTEM |
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| Yan Enrang,Yang Xiumin. THE LIMIT CYCLES OF A CLASS HIGHER-DEGREE DIFFERENTIAL SYSTEM[J]. Journal of Baoji College of Arts and Science(Natural Science Edition), 1996, 16(1): 5-10 |
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| Authors: | Yan Enrang Yang Xiumin |
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| Abstract: | This paper mainly discusses the limit cycles of the differential equation by principle of poincare in transformation of polar coordinates.It gives some theorems for the timit cycles existence. unexistence and number. |
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| Keywords: | differential equtions limit cycle principle of poincare. |
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