Limit Cycles of a Quadratic System with Two Parallel Straight Line-Isoclines

Details Limit Cycles of a Quadratic System with Two Parallel Straight Line-Isoclines Limit Cycles of a Quadratic System with Two Parallel Straight Line-Isoclines

2008-03-20

arxiv.org/abs/0803.3055v1

Mathematics

Dynamical Systems

10 pages

Scientific paper

In this paper, a quadratic system with two parallel straight line-isoclines is considered. This system corresponds to the system of class II in the classification of Ye Yanqian. Using the field rotation parameters of the constructed canonical system and geometric properties of the spirals filling the interior and exterior domains of its limit cycles, we prove that the maximum number of limit cycles in a quadratic system with two parallel straight line-isoclines and two finite singular points is equal to two. Besides, we obtain the same result in a different way: applying the Wintner-Perko termination principle for multiple limit cycles and using the methods of global bifurcation theory developed earlier by the author.

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