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A Class of Planar Quadratic Vector Fields with a Limit Cycle Surrounded by a Saddle Loop
Proceedings of the American Mathematical Society
Vol. 88, No. 4 (Aug., 1983), pp. 719-724
Published by: American Mathematical Society
Stable URL: http://www.jstor.org/stable/2045470
Page Count: 6
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Examples of planar quadratic vector fields with a limit cycle surrounded by a saddle loop are given by means of deformations of Hamiltonian vector fields.
Proceedings of the American Mathematical Society © 1983 American Mathematical Society