The loca l bifurcation characteristic near by codimension two bifurcation point is discus sed,which testifies that the local dynamical behavior of map f(v ,X)may be known under the condition of cod.

• 应用中心流形范式方法分析了高维映射在两个实特征值同时穿越单位圆周情况下的余维二分岔。