%0 Journal Article
%T ON THE UNIQUENESS OF THE LIMIT CYCLE OF THE QUADRATIC SYSTEM WITH A WEAK FOCUS OF ORDER 2<br>具有二阶细焦点的二次系统极限环的唯一性
%A CHEN WEN-CHENG
%A ZHANG PIN-GUANG
%A <br>陈文成
%J 系统科学与数学
%D 1991
%I 
%X This paper,under fairly general conditions,it is proved that a quadratic system with afocus of order 2 has at most one limit cycle around the weak focus.As a consequence,all theresults of 5] can be deduced from this paper.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=37F46C35E03B4B86&jid=0CD45CC5E994895A7F41A783D4235EC2&aid=6BD198679572A8747B9FCCE862E66AAA&yid=116CB34717B0B183&vid=708DD6B15D2464E8&iid=38B194292C032A66&sid=F9F74EC1AA08A7B9&eid=6ED15D8DCB279BC4&journal_id=1000-0577&journal_name=系统科学与数学&referenced_num=4&reference_num=0