巴乌金二次系统焦点量又一种计算方法  

A New Approach for Calculating Focus of Bаутин's Quadratic Differential System

作　　者：曹勃[1] 云连英[2] 

机构地区：[1]宁波职业技术学院,浙江宁波315800 [2]台州职业技术学院计算机工程系,浙江台州318000

出　　处：《宁波大学学报（理工版）》2008年第3期370-373,共4页Journal of Ningbo University：Natural Science and Engineering Edition

摘　　要：通过具有三阶细鞍点二次系统的鞍点量公式,较简洁地推证出具有三阶细焦点巴乌金(Bаутин)二次系统的焦点量公式,由此说明二次系统的焦点量与鞍点量的相互关系。Based on the saddle point value of a quadratic differential system with weak 3-order saddle points, the paper gives concise yet clear derivation of the focus value of BayrTNH＇s quadratic different system with weak 3-order focuses. As a result, the profound relation between saddle point value and focus value of quadratic differential system is validated.

关 键 词：巴乌金二次系统 鞍点量 焦点量 

分 类 号：O175[理学—数学]