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Chen Xiudong Chen Yong 《Annals of Differential Equations》2006,22(2):144-148
We have proved that Lienard equation with F(x) = -F(-x) has at most n limit cycles. Under the condition, an affirmative answer to A.Lins, W.de Melo and C.C.Pugh's conjecture is given. 相似文献
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