On the number invariant line of planar polynomial differential systems from above estimate

Author(s):  
V. Tlyachev ◽  
A. Ushho ◽  
D. Ushho
2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Zhengxin Zhou

We will introduce Mironenko’s method to discuss the Poincaré center-focus problem, and compare the methods of Lyapunov and Mironenko. We apply the Mironenko method to discuss the qualitative behavior of solutions of some planar polynomial differential systems and derive the sufficient conditions for a critical point to be a center.


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