Global Phase Portraits Of Some Reversible Cubic Centers With Collinear Or Infinitely Many Singularities
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS(2012)
摘要
We study the reversible cubic vector fields of the form (x)over dot = -y + ax(2) + bxy + cy(2) - y(x(2) + y(2)), (y)over dot = x + dx(2) + exy + fy(2) + x(x(2) + y(2)), having simultaneously a center at infinity and at the origin. In this paper, the subclass of these reversible systems having collinear or infinitely many singularities are classified with respect to topological equivalence.
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关键词
Center-focus problem, reversible planar vector fields, cubic vector fields, global classification of phase portraits
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