【摘要】 采用微分几何与函数极值分析相结合的方法 ,利用椭圆星形线的特性 ,确定了椭圆上的几何切点与距离函数极值点的对应关系 ,指出了距离函数极值点存在的几何区域 (或条件 ) ,建立了最远点及最近点的准确数值计算方法 .更多还原

【Abstract】 By adopting the method which combines differential coefficient geometry method and function extremum analyse method,and by making use of the characteristic of the astroid,it ascertains the corresponding relation between the geometry tangent points of the Ellipse and the function extremum points of the distance function,points out the geometry region(or condition) for presence of the function extremum points,sets up the nicety method of numerical value computing for the farthest points and the proximate points on the ellipse to a random known point.更多还原