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LIMIT CYCLES TO A FOUR-DIMENSIONAL LINEAR CENTER
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作者 zouhair diab Amar Makhlouf 《Annals of Differential Equations》 2013年第4期399-405,共7页
In this paper we study a four-dimensional linear center. Based on the averaging theory, we investigate the existence of limit cycles of the system.
关键词 limit cycle averaging theory PERTURBATION
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