%0 Journal Article
%T Concerning the Center of the System(x) =h(y)-F(x),y=-g(x)<br>关于系统(x)=h(y)-F(x),(y)=-g(x) 的中心
%A Yan Ping
%A Jiang Jifa
%A <br>严平
%A 蒋继发
%J 系统科学与数学
%D 1999
%I 
%X In this paper, for the origin of the generalized Lienard systems to be the global centerand the local center we give the necessary and sufficient conditions and sufficient conditionsrespectively. The results of papers 1-6] are thus extended and improved.
%K Generalized Lienard system
%K local center
%K global center<br>广义Lienard系统
%K 局部中心
%K 全局中心
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=37F46C35E03B4B86&jid=0CD45CC5E994895A7F41A783D4235EC2&aid=57437B98F624E4A7CD3CE930143342B5&yid=B914830F5B1D1078&vid=2A8D03AD8076A2E3&iid=38B194292C032A66&sid=A5111BA190517959&eid=EF78DD85C21CB57F&journal_id=1000-0577&journal_name=系统科学与数学&referenced_num=4&reference_num=0