Abstract
We define the center variety for families of $p:-q$ resonant polynomial vector fields and prove the correctness of the definition. We also derive an algorithm for computing the focus quantities of such vector fields.
Citation
Valery G. Romanovski. Douglas S. Shafer. "On the Center Problem for $p:-q$ Resonant Polynomial Vector Fields." Bull. Belg. Math. Soc. Simon Stevin 15 (5) 871 - 887, December 2008. https://doi.org/10.36045/bbms/1228486413
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