摘要
为了在高观念下审视初等几何提供理论支撑,运用射影几何的方法研究了二阶曲线的主轴、顶点、焦点、准线、离心率等度量性质.得到三种类型的非退化二阶曲线其主轴、顶点、焦点的个数及离心率的大小等情况.
In order to examine the elementary geometry under high concept to provide theoretical support,In the method of projective geometry to study the second-order curve axis,vertex,focus,alignment,the nature of heart rate and other metrics.three types of non-degenerate second-order curve of the spindle,vertex,the number of focus and size of eccentricity and so on are gained.
出处
《阜阳师范学院学报（自然科学版）》
2010年第3期33-36,共4页
Journal of Fuyang Normal University(Natural Science)
基金
校级重点科研项目(2008-ASL-09)资助
关键词
二阶曲线
主轴
顶点
焦点
准线
离心率
second-order curve
spindle
vertex
focus
alignment
eccentricity
