Centers and limit cycles of vector fields defined on invariant spheres
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2021-09-25Type
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The aim of this paper is the study of the center-focus and cyclicity problems inside the class X of 3-dimensional vector fields that admit a first integral that leaves invariant any sphere centered at the origin. We classify the centers of linear, quadratic homogeneous and a family of quadratic vector fields F ⊂ X, restricted to one of these spheres. Moreover, we show the existence of at least 4 limit cycles in family F.
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Buzzi, Claudio A; Rodero, Ana Livia; Torregrosa, Joan. Centers and limit cycles of vector fields defined on invariant spheres. Journal of Nonlinear Science volume 31, Article number: 92 (2021) Available at: <http://hdl.handle.net/11449/216584>.
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English
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Outra
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