| GEOMETRIC PROPERTIES OF A CLASS OF CUBIC SYSTEM WITH AN INVARIANT LINE |
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| 作者姓名： | ZHANG Xingan LIANG Zhaojun |
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| 作者单位： | Department of Mathematics，Central China Normal University，Wuhan 430070，China |
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| 摘 要： | ＧＥＯＭＥＴＲＩＣＰＲＯＰＥＲＴＩＥＳＯＦＡＣＬＡＳＳＯＦＣＵＢＩＣＳＹＳＴＥＭＷＩＴＨＡＮＩＮＶＡＲＩＡＮＴＬＩＮＥＺＨＡＮＧＸｉｎｇａｎ；ＬＩＡＮＧＺｈａｏｊｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＣｅｎｔｒａｌＣｈｉｎａＮｏｒｍａ...
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GEOMETRIC PROPERTIES OF A CLASS OF CUBICSYSTEM WITH AN INVARIANT LINE |
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| ZHANG Xingan, LIANG Zhaojun,.GEOMETRIC PROPERTIES OF A CLASS OF CUBICSYSTEM WITH AN INVARIANT LINE[J].Journal of Systems Science and Complexity,1996(2). |
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| Authors: | ZHANG Xingan LIANG Zhaojun |
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| Abstract: | This paper has obtained that the cubic system (1)is topologically equivalent to the general quadratic system. By the use of this property, wecan derive the conditions of a unique limit cycle and the necessary and sufficient conditionsof a centre for the cubic Kolmogorov model (2) |
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| Keywords: | Central projective transformation diffeomorphically conjugate topologicallyequivalent |
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