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Uniform isochronous center of a class of higher degree polynomial differential systems
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In this paper,we give the necessary and sufficient conditions for a class of higher degree polynomial systems to have a uniform isochronous center.At the same time,we prove that for this system the composition conjecture is correct.
composition conjecturecenter conditionuniform isochronous center
ZHOU Zheng-xin、LU Fei-fei
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School of Mathematical Sciences,Yangzhou University,Yangzhou 225002,China