Parametric Centers for Trigonometric Abel Equations |
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Authors: | Jean-Pierre Françoise |
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Affiliation: | (1) Laboratoire J.-L. Lions, UMR 7598, CNRS, Université P.-M. Curie, Paris6, Paris, France |
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Abstract: | This article is devoted to one-dimensional perturbative theory on R × S 1. There is a recursive formula for the successive obstructions to parametric center at any order of the perturbation parameter. The first obstruction is studied by means of complex analysis techniques. This extends to the trigonometric case what was done previously for the polynomial case (Israel J. Math. 142, 273–283, 2004). This article is dedicated to Professor Zhang Zhi-Fen on the occasion of her 80th Birthday |
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Keywords: | Center Perturbation theory Abel equations |
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