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  • 期刊=Numerical Mathematics（Theory,Methods and Applications）x
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BIFURCATION ANALYSIS AND COMPUTATION OF DOUBLE TAKENS-BOGDANOV POINT IN Z_2-EQUIVARIABLE NONLINEAR EQUATIONS
《Numerical Mathematics A Journal of Chinese Universities(English Series)》2005年第4期315-324,共10页杨忠华 周尉 
Supported by National Natural Science Foundation of China(19971057)Shanghai Development Foundation for Science and Technology(No.00JC14057)Shanghai Science and Technology Committee(No.03QA14036)Doctoral Program of National Higher Education
The paper deals with the computation and bifurcation analysis of double Takens-Bogdanov point (u0, ∧0) (in short, DTB point) in the Z2-equivariable nonlinear equation f(u, ∧) = 0, f: U × R4 → V , where U and V are...
关键词：分歧理论 Takens-Bogdanov点 Z2同变 扩展系统 BANACH空间 
EXTENDED SYSTEMS FOR MULTIPLE S-BREAKING TURNING POINTS IN Z_2×Z_2-SYMMETRIC NONLINEAR PROBLEMS
《Numerical Mathematics A Journal of Chinese Universities(English Series)》1995年第2期119-132,共14页叶瑞松 杨忠华 Arshad Mahmood 
This work is supported by NSFC amd Slate Major Key Project for Baslc Research
Making use of the Z2×Z2 symmetry,we could study the structure near multiple S-treaking turning points.In particular,we show that there exist two kinds of singular point path through double S breaking turning points a...
关键词：Z2×Z2 symmetry double S-breaking TURNING POINTS triple S-breaking TURNING POINTS tetended systems 
BIFURCATION OF SINGULAR POINTS NEAR A DOUBLE FOLD POINT INZ_2 -SYMMETRIC NONLINEAR EQUATIONS
《Numerical Mathematics A Journal of Chinese Universities(English Series)》1993年第1期101-115,共15页吴微 吴柏生 李荣华 
We consider the bifurcation of singular points near a double fold point in Z2 -symmetric nonlinear equations with two parameters,where the linearization has a two dimensional null space spanned by a symmetric null vec...
关键词：DOUBLE FOLD POINTS Z2 -symmetry BIFURCATION of nonlinear equations singular POINTS turning POINTS pitchfork POINTS extended systems. 
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