Advances in Mathematical Physics / 2015 / Article / Fig 2

Research Article

Existence of Center for Planar Differential Systems with Impulsive Perturbations

Figure 2

The focus of system (57a) and (57b). (a) A stable focus, where . (b) An unstable focus, where . (c) An unstable focus, where .
(a)
(b)
(c)

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