QUALITATIVE THEORY OF THE QUADRATIC DIFFERENTIAL SYSTEMS (II)-ERGODICITY OF LIMIT CYCLES |
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作者姓名: | 叶彦谦 |
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作者单位: | 南京大学 |
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摘 要: | Asiswel-knownwhenarealquadraticdiferentialsystem:x=-y+δx+lx2+mxy+ny2=P(x,y),y=x(1+ax+by)=Q(x,y)(1)hasfourfinitecriticalpoints...
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