most citedThe Faa di Bruno Hopf algebra for multivariable feedback recursions in the center problem for higher order Abel equations

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math.CA2017★ 15 cited

The Faa di Bruno Hopf algebra for multivariable feedback recursions in the center problem for higher order Abel equations

Kurusch Ebrahimi-Fard, W. Steven Gray

Poincare's center problem asks for conditions under which a planar polynomial system of ordinary differential equations has a center. It is well understood that the Abel equation n…