| Volume 3, Number 2, 2013, Pages 133-144 DOI：10.11948/2013011 |
| Composition Conditions In The Trigonometric Abel Equation |
| Jaume Gine,Maite Grau,Xavier Santallusia |
| Keywords:Center problem |
| Abstract: |
| In this paper we deal with the center problem for the trigonometricAbel equation dρ/dρ =a1(θ)ρ^2+a2(θ)ρ^3; where a1(θ) and a2(θ)are trigonometric polynomials in θ. This problem is closely connectedwith the classical Poincar´e center problem for planar polynomial vectorfields. |
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