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中心与焦点判定定理证明之补充 被引量:3

Complement to a Proof of Discriminating Theorem on Center and Focus
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摘要 中心与焦点判定问题的研究是微分方程定性理论课程教学的重要内容之一,然而我们发现在近30年出版的10多种国内外教材中对其中一个主要定理的涉及Poincare形式级数的证明均有缺陷,本文之目的就是对这一证明做了完整的补充. The discrimination of center and focus for planar differential systems is an important part in the study of qualitative theory of differential equations.However,we found that there is a gap in a proof of a theorem in this aspect which appears in more than ten textbooks published in recent 30 years.The aim of this paper is to complement the gap to the proof of the theorem.
作者 韩茂安
出处 《大学数学》 2011年第1期142-147,共6页 College Mathematics
关键词 中心 焦点 判定 Poincare形式级数 center focus discrimination Poincare series
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参考文献8

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同被引文献27

  • 1韩茂安;朱德明.微分方程分支理论[M]{H}北京:煤炭工业出版社,1994.
  • 2韩茂安.动力系统的周期解与分支理论[M]{H}北京:科学出版社,2002.
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  • 4赵爱民;李美丽;韩茂安.微分方程基本理论[M]{H}北京:科学出版社,2013.
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  • 7韩茂安;周盛凡;邢业朋.常微分方程[M]{H}北京:高等教育出版社,2011.
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