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Título:	The three-dimensional center problem for the zero-Hopf singularity
Autor/a:	García, I. A. (Isaac A.); Valls, Claudia
Notas:	In this work we extend well-known techniques for solving the Poincar\'e-Lyapunov nondegenerate analytic center problem in the plane to the 3-dimensional center problem at the zero-Hopf singularity. Thus we characterize the existence of a neighborhood of the singularity completely foliated by periodic orbits (including continua of equilibria) via an analytic Poincar\'e return map. The vanishing of the first terms in a Taylor expansion of the associated displacement map provides us with the necessary 3-dimensional center conditions in the parameter space of the family whereas the sufficiency is obtained through symmetry-integrability methods. Finally we use the proposed method to classify the 3-dimensional centers of some quadratic polynomial differential families possessing a zero-Hopf singularity. The first author is partially supported by a MINECO grant number MTM2014-53703-P and by a CIRIT grant number 2014 SGR 1204. The second author is partially supported by Portuguese national funds through FCT - Fundaçao para a Ciéncia e a Tecnologia: project UID/MAT/04459/2013 (CAMGSD).
Materia(s):	-Zero-Hopf singularity -Three-dimensional vector fields -Continua of periodic orbits -Poincaré map -Matemàtica -Mathematics
Derechos:	(c) American Institute of Mathematical Sciences , 2016
Tipo de documento:	Artículo Artículo - Versión aceptada
Editor:	American Institute of Mathematical Sciences
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