BIFURCATION THEORY OF QUADRATIC DIFFERENTIAL SYSTEMS |
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Authors: | Ye Yanqian |
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Institution: | Department of Mathematics, Nanjing University, Nanjing 210008, China. |
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Abstract: | This paper deals with the number of limit cycles and bifurcation problem of quadratic differential systems. Under conditions $a<0,b+2l>0,l+1<0$, the author draws three bifurcation diagrams of the system (1.18) below in the (\delta,m) plane, which show that the maximum number of limit cycles around a focus is two in this case. |
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Keywords: | |
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