ON TWO CONJECTURES OF THE QUADRATIC DIFFERENTIAL SYSTEMS

Citation:

Zhang Xiang.ON TWO CONJECTURES OF THE QUADRATIC DIFFERENTIAL SYSTEMS[J].Chinese Annals of Mathematics B,1997,18(4):429~434
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Authors:

Zhang Xiang;

Foundation:

the National Natural Science Foundation of China
Abstract: Two conjectures in the qualitative theory of quadratic differential systems are proved under certain conditions.

Keywords:

Quadratic system, Limit cycle, Dulac function

Classification:

34C05
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