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20052022
most citedThe problem of distinguishing between a center and a focus for nilpotent and degenerate analytic systems

102 citations · 287 across the 18 of their papers we have counts for

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math.CA2017

A counterexample to the composition condition conjecture for polynomial Abel differential equations

Jaume Giné, Maite Grau, Xavier Santallusia

The Polynomial Abel differential equations are considered a model problem for the classical Poincaré center--focus problem for planar polynomial systems of ordinary differential eq…