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Advances in Mathematical Physics
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Advances in Mathematical Physics
/
2015
/
Article
/
Fig 1
/
Research Article
Existence of Center for Planar Differential Systems with Impulsive Perturbations
Figure 1
The center and focus of system (
48a
) and (
48b
). (a) The center, where
. (b) An unstable focus, where
. (c) A stable focus, where
.
(a)
(b)
(c)