Abstract
A global center of a vector field in the plane is an equilibrium point such that the whole plane with the exception of the equilibrium point is filled with periodic orbits. We classify all Kukles systems of degree three that have global centers.
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Acknowledgements
The authors are grateful to the reviewer for his/her suggestions that helped them to improve the presentation of the paper. Fabio Scalco Dias and Luis Fernando Mello are partially supported by Fundação de Amparo à Pesquisa do Estado de Minas Gerais [Grant number APQ-01158-17] and Fundação de Amparo à Pesquisa do Estado de São Paulo [Grant number 2019/07316-0]. Luis Fernando Mello is partially supported by Fundação de Amparo à Pesquisa do Estado de Minas Gerais [Grant number APQ-01105-18] and by Conselho Nacional de Desenvolvimento Científico e Tecnológico [Grant number 311921/2020-5]. Claudia Valls is partially supported by FCT/Portugal through CAMGSD, IST-ID, projects UIDB/04459/2020 and UIDP/04459/2020.
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Dias, F.S., Mello, L.F. & Valls, C. Kukles Systems of Degree Three with Global Centers. Bull Braz Math Soc, New Series 54, 46 (2023). https://doi.org/10.1007/s00574-023-00363-7
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DOI: https://doi.org/10.1007/s00574-023-00363-7