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The renormalization group method is one of the singular perturbation methodsused in the research of the asymptotic behavior of solution of ordinarydifferential equations. In this paper, the equation of VAN der Pol generalizedoscillator that models many physical phenomena is considered. A brief review ofthe technique is done and is applied to the generalized VAN der Pol oscillatorto highlight its asymptotic solution.

Etude de l'oscillateur de Van der Pol g\'en\'eralis\'e par la m\'ethode du groupe de renormalisation