Center conditions for a polynomial differential system. (English) Zbl 1275.34047

Differ. Equ. 49, No. 2, 151-165 (2013); translation from Differ. Uravn. 49, No. 2, 151-164 (2013).
The authors obtain 16 center conditions for a polynomial differential system with 27 parameters.


34C05 Topological structure of integral curves, singular points, limit cycles of ordinary differential equations
34C25 Periodic solutions to ordinary differential equations
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