节点文献
关于fxxfyy-fxy2=0时函数f(x,y)的极值的一个注记
An Annotation About The Extreme Value of Function f(x,y) at fxxfyy-f2xy=0
【摘要】 用驻点的去心邻域内各点P处函数沿以驻点为端点的过点P的射线方向的方向导数是否同号,来判定二元函数f(x,y)在fxxfyy-f2xy=0时的极限。
【Abstract】 The extreme value of binary function at fxxfyy-f2xy=0 is judged by its direction derivative which follows ray starting from stable point and passing point P at every point P in noncentral neighborhood of stable point.
- 【文献出处】 辽宁工学院学报 ,Journal of Liaoning Institute of Technology , 编辑部邮箱 ,2004年03期
- 【分类号】O174
- 【被引频次】1
- 【下载频次】33