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机译:Fifteen Limit Cycles Bifurcating from a Perturbed Cubic Center
Laboratory of Analysis and Control of Differential Equations ACED, Department of Mathematics, University of Guelma, P.O. Box 401, Guelma 24000, Algeria;
Department of Mathematics, College of Sciences and Arts, ArRas, Qassim University, Buraydah, Saudi Arabia;
College of Industrial Engineering, King Khalid University, Abha, Saudi ArabiaDepartment of Mathematics, Faculty of Science, SVU, Qena 83523, Egypt;